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The Roman Republic (Latin: Res publica Romana; Classical Latin: [ˈreːs ˈpuːb.lɪ.ka roːˈmaː.na]) was the period of ancient Roman civilization beginning with the overthrow of the Roman Kingdom, traditionally dated to 509 BC, and ending in 27 BC with the establishment of the Roman Empire. It was during this period that Rome's control expanded from the city's immediate surroundings to hegemony over the entire Mediterranean world. During the first two centuries of its existence the Roman Republic expanded through a combination of conquest and alliance, from central Italy to the entire Italian peninsula. By the following century it included North Africa, Spain, and what is now southern France. Two centuries after that, towards the end of the 1st century BC, it included the rest of modern France, Greece, and much of the eastern Mediterranean. By this time, internal tensions led to a series of civil wars, climaxing with the assassination of Julius Caesar, which ended with the establishment of the Roman Empire. The exact date of the transition to the Roman Empire can be a matter of interpretation. Historians have variously proposed Julius Caesar's crossing of the Rubicon River in 49 BC, Caesar's appointment as dictator for life in 44 BC, and the defeat of Mark Antony and Cleopatra at the Battle of Actium in 31 BC. Most, however, use the same date as did the ancient Romans themselves, the Roman Senate's grant of extraordinary powers to Octavian and his adopting the title Augustus in 27 BC, as the defining event ending the Republic.
Roman government was headed by two consuls, elected annually by the citizens and advised by a senate composed of appointed magistrates. As Roman society was very hierarchical by modern standards, the evolution of the Roman government was heavily influenced by the struggle between the patricians, Rome's land-holding aristocracy, who traced their ancestry back to the founding of Rome, and the plebeians, the far more numerous citizen-commoners. Over time, the laws that gave patricians exclusive rights to Rome's highest offices were repealed or weakened, and leading plebeian families became full members of the aristocracy. The leaders of the Republic developed a strong tradition and morality requiring public service and patronage in peace and war, making military and political success inextricably linked. Many of Rome's legal and legislative structures (later codified into the Justinian Code, and then again into the Napoleonic Code) can still be observed throughout Europe and much of the world in modern nation states and international organizations.
- 1 Military history
- 1.1 Early Republic (458–274 BC)
- 1.2 Mid-Republic (274–148 BC)
- 1.3 Late Republic (147–30 BC)
- 1.3.1 Jugurthine War (111–104 BC)
- 1.3.2 The Celtic threat (121 BC) and the new Germanic threat (113–101 BC)
- 1.3.3 Internal unrest (135–71 BC)
- 1.3.4 Conflicts with Mithridates (89–63 BC) and the Cilician pirates (67 BC)
- 1.3.5 Caesar's early campaigns (59–50 BC)
- 1.3.6 Triumvirates and Caesarian ascension (53–30 BC)
- 2 Political history
- 2.1 Patrician Era (509–367 BC)
- 2.2 Conflict of the Orders (367–287 BC)
- 2.3 Supremacy of the New Nobility (287–133 BC)
- 2.4 From the Gracchi to Caesar (133–49 BC)
- 2.5 The period of transition (49–29 BC)
- 3 Military
- 4 Politics
- 5 Culture
- 6 See also
- 7 References
- 8 Sources
- 9 External links
The exact causes and motivations for Rome's military conflicts and expansions during the republic are subject to wide debate. While they can be seen as motivated by outright aggression and imperialism, historians typically take a much more nuanced view. They argue that Rome's expansion was driven by short-term defensive and inter-state factors (i.e. relations with city-states and kingdoms outside of Rome's hegemony), and the new contingencies that these decisions created. In its early history, as Rome successfully defended itself against foreign threats in central and then northern Italy, neighboring city-states sought the protection a Roman alliance would bring. As such, early republican Rome was not an "empire" or "state" in the modern sense, but an alliance of independent city-states (similar to the Greek hegemonies of the same period) with varying degrees of genuine independence (which itself changed over time) engaged in an alliance of mutual self-protection, but led by Rome. With some important exceptions, successful wars in early republican Rome generally led not to annexation or military occupation, but to the restoration of the status quo ante. But the defeated city would be weakened (sometimes with outright land concessions) and thus less able to resist Romanizing influences, such as Roman settlers seeking land or trade with the growing Roman confederacy. It was also less able to defend itself against its non-Roman enemies, which made attack by these enemies more likely. It was, therefore, more likely to seek an alliance of protection with Rome.
This growing coalition expanded the potential enemies that Rome might face, and moved Rome closer to confrontation with major powers. The result was more alliance-seeking, on the part of both the Roman confederacy and city-states seeking membership (and protection) within that confederacy. While there were exceptions to this (such as military rule of Sicily after the First Punic War), it was not until after the Second Punic War that these alliances started to harden into something more like an empire, at least in certain locations. This shift mainly took place in parts of the west, such as the southern Italian towns that sided with Hannibal. Roman expansion into Spain and Gaul, in contrast, occurred as a mix of alliance-seeking and military occupation. In the 2nd century BC, Roman involvement in the Greek east remained a matter of alliance-seeking, but this time in the face of major powers that could rival Rome. According to Polybius, who sought to trace how Rome came to dominate the Greek east in less than a century, this was mainly a matter of several Greek city-states seeking Roman protection against the Macedonian kingdom and Seleucid Empire in the face of destabilisation created by the weakening of Ptolemaic Egypt. In contrast to the west, the Greek east had been dominated by major empires for centuries, and Roman influence and alliance-seeking led to wars with these empires that further weakened them and therefore created an unstable power vacuum that only Rome was capable of pacifying. This had some important similarities to (and some important differences from) the events in Italy centuries earlier, but this time on a global scale. Historians see the growing Roman influence over the east, as with the west, as not a matter of intentional empire-building, but constant crisis management narrowly focused on short-term goals within a highly unstable, unpredictable, and inter-dependent network of alliances and dependencies. With some major exceptions of outright military rule, the Roman Republic remained an alliance of independent city-states and kingdoms (with varying degrees of independence, both de jure and de facto) until it transitioned into the Roman Empire. It was not until the time of the Roman Empire that the entire Roman world was organized into provinces under explicit Roman control.
Early Republic (458–274 BC)
Early Italian campaigns (458–396 BC)The first Roman republican wars were wars of both expansion and defence, aimed at protecting Rome itself from neighbouring cities and nations and establishing its territory in the region. Initially, Rome's immediate neighbours were either Latin towns and villages, or else tribal Sabines from the Apennine hills beyond. One by one Rome defeated both the persistent Sabines and the local cities, both those under Etruscan control and those that had cast off their Etruscan rulers. Rome defeated Latin cities in the Battle of Lake Regillus in 496 BC, the Battle of Mons Algidus in 458 BC, the Battle of Corbione in 446 BC, the Battle of Aricia, and especially the Battle of the Cremera in 477 BC wherein it fought against the most important Etruscan city of Veii.
Celtic invasion of Italia (390–387 BC)
By 390 BC, several Gallic tribes were invading Italy from the north as their culture expanded throughout Europe. The Romans were alerted to this when a particularly warlike tribe invaded two Etruscan towns which were not far from Rome's sphere of influence. These towns, overwhelmed by the enemy's numbers and ferocity, called on Rome for help. The Romans met the Gauls in pitched battle at the Battle of Allia River around 390–387 BC. The Gauls, under their chieftain Brennus, defeated the Roman army of approximately 15,000 troops, pursued the fleeing Romans back to Rome itself, and sacked the city before being either driven off or bought off. Now that the Romans and Gauls had bloodied one another, intermittent warfare was to continue between the two in Italy for more than two centuries.[relevant? ]
Roman expansion into Italia (343–282 BC)
After recovering surprisingly swiftly from the sack of Rome, the Romans immediately resumed their expansion within Italy. The First Samnite War of between 343 BC and 341 BC was a relatively short affair: the Romans beat the Samnites in two battles, but were forced to withdraw from the war before they could pursue the conflict further due to the revolt of several of their Latin allies in the Latin War. Rome bested the Latins in the Battle of Vesuvius and again in the Battle of Trifanum, after which the Latin cities were obliged to submit to Roman rule.
The Second Samnite War, from 327 BC to 304 BC, was a much longer and more serious affair for both the Romans and Samnites. The fortunes of the two sides fluctuated throughout its course. But the Romans won the Battle of Bovianum, and the tide turned strongly against the Samnites from 314 BC onwards, leading them to sue for peace with progressively less generous terms. By 304 BC the Romans had effectively annexed the greater degree of the Samnite territory, founding several colonies.
Seven years after their defeat, with Roman dominance of the area looking assured, the Samnites rose again and defeated a Roman army in 298 BC, to open the Third Samnite War. Following this success they built a coalition of several previous enemies of Rome. At the Battle of Populonia in 282 BC Rome finished off the last vestiges of Etruscan power in the region.
Pyrrhic War (280–275 BC)
By the beginning of the 3rd century, Rome had established itself as a major power on the Italian Peninsula, but had not yet come into conflict with the dominant military powers in the Mediterranean Basin at the time: Carthage and the Greek kingdoms.
When a diplomatic dispute between Rome and a Greek colony in Italy erupted into open warfare in a naval confrontation, the Greek colony appealed for military aid to Pyrrhus, ruler of the northwestern Greek kingdom of Epirus. Motivated by a personal desire for military accomplishment, Pyrrhus landed a Greek army of some 25,000 men on Italian soil in 280 BC.
Despite early victories, Pyrrhus found his position in Italy untenable. Rome steadfastly refused to negotiate with Pyrrhus as long as his army remained in Italy. Facing unacceptably heavy losses from each encounter with the Roman army, Pyrrhus withdrew from the peninsula (hence the term "Pyrrhic victory"). In 275 BC, Pyrrhus again met the Roman army at the Battle of Beneventum. While Beneventum was indecisive, Pyrrhus realised his army had been exhausted and reduced by years of foreign campaigns. Seeing little hope for further gains, he withdrew completely from Italy.
The conflicts with Pyrrhus would have a great effect on Rome. Rome had shown it was capable of pitting its armies successfully against the dominant military powers of the Mediterranean, and that the Greek kingdoms were incapable of defending their colonies in Italy and abroad. Rome quickly moved into southern Italia, subjugating and dividing the Greek colonies. Now, Rome effectively dominated the Italian peninsula, and won an international military reputation.
Mid-Republic (274–148 BC)
Punic Wars (264–146 BC)
The First Punic War began in 264 BC when inhabitants of Sicily began to appeal to the two powers between which they lay – Rome and Carthage – to resolve internal conflicts. The war saw land battles in Sicily early on, but the theatre shifted to naval battles around Sicily and Africa. Before the First Punic War there was no Roman navy to speak of. The new war in Sicily against Carthage, a great naval power, forced Rome to quickly build a fleet and train sailors.
The first few naval battles were disasters for Rome. However, after training more sailors and inventing a grappling engine, a Roman naval force was able to defeat a Carthaginian fleet, and further naval victories followed. The Carthaginians then hired Xanthippus of Carthage, a Spartan mercenary general, to reorganise and lead their army. He cut off the Roman army from its base by re-establishing Carthaginian naval supremacy. The Romans then again defeated the Carthaginians in naval battle at the Battle of the Aegates Islands and left Carthage with neither a fleet nor sufficient coin to raise one. For a maritime power the loss of their access to the Mediterranean stung financially and psychologically, and the Carthaginians sued for peace.
Continuing distrust led to the renewal of hostilities in the Second Punic War when Hannibal Barca attacked an Iberian town which had diplomatic ties to Rome. Hannibal then crossed the Italian Alps to invade Italy. Hannibal's successes in Italy began immediately, and reached an early climax at the Battle of Cannae, where 70,000 Romans were killed.
The Romans held off Hannibal in three battles, but then Hannibal smashed a succession of Roman consular armies. By this time Hannibal's brother Hasdrubal Barca sought to cross the Alps into Italy and join his brother with a second army. Hasdrubal managed to break through into Italy only to be defeated decisively on the Metaurus River. Unable to defeat Hannibal on Italian soil, the Romans boldly sent an army to Africa under Scipio Africanus to threaten the Carthaginian capital. Hannibal was recalled to Africa, and defeated at the Battle of Zama.
Carthage never recovered after the Second Punic War and the Third Punic War that followed was in reality a simple punitive mission to raze the city of Carthage to the ground. Carthage was almost defenceless, and submitted when besieged. However, the Romans demanded complete surrender, and the Carthaginians refused. The city was besieged, stormed, and completely destroyed. Ultimately, all of Carthage's North African and Iberian territories were acquired by Rome.
Kingdom of Macedonia, the Greek poleis, and Illyria (215–148 BC)
Rome's preoccupation with its war with Carthage provided an opportunity for Philip V of the kingdom of Macedonia, located in the north of the Greek peninsula, to attempt to extend his power westward. Philip sent ambassadors to Hannibal's camp in Italy, to negotiate an alliance as common enemies of Rome. However, Rome discovered the agreement when Philip's emissaries were captured by a Roman fleet. The First Macedonian War saw the Romans involved directly in only limited land operations, but they ultimately achieved their objective of pre-occupying Philip and preventing him from aiding Hannibal.
The past century had seen the Greek world dominated by the three primary successor kingdoms of Alexander the Great's empire: Ptolemaic Egypt, Macedonia and the Seleucid Empire. In 202 BC, internal problems lead to a weakening of Egypt's position, thereby disrupting the power balance among the successor states. Macedonia and the Seleucid Empire agreed to an alliance to conquer and divide Egypt. Fearing what this increasingly unstable situation might lead to, several small Greek kingdoms sent delegations to Rome to seek an alliance. Polybius, our primary source on this series of events, doesn't tell us in his surviving works what the exact Roman reason was for getting involved (prior Greek attempts to involve Rome in Greek affairs had always been met with Roman apathy), but ultimately the Greek delegations were successful. Rome gave Philip an ultimatum that he must cease in his campaigns against Rome's new Greek allies. Doubting Rome's strength (not an unfounded belief given Rome's performance in the First Macedonian War) Philip ignored the request, and Rome sent an army of Romans and Greek allies to force the issue, beginning the Second Macedonian War. Surprisingly (given his recent successes against the Greeks and earlier successes against Rome), Philip's army buckled under the pressure from the Roman-Greek army. In 197 BC the Romans decisively defeated Philip at the Battle of Cynoscephalae, and Philip was forced to give up his recent Greek conquests. The Romans declared the "Peace of the Greeks", believing that Philip's defeat now meant that Greece would be stable. They pulled out of Greece entirely, maintaining minimal contacts with their Greek allies.
With Egypt and Macedonia now weakened, the Seleucid Empire became increasingly aggressive and successful in its attempts to conquer the entire Greek world. Now not only did Rome's allies against Philip seek a Roman alliance against the Seleucids, but Philip himself even sought an alliance with Rome. The situation was made worse by the fact that Hannibal was now a chief military advisor to the Seleucid emperor, and the two were believed to be planning for an outright conquest not just of Greece, but of Rome itself. The Seleucids were much stronger than the Macedonians had ever been, given that they controlled much of the former Persian Empire, and by this point had almost entirely reassembled Alexander the Great's former empire. Fearing the worst, the Romans began a major mobilization, all but pulling out of recently pacified Spain and Gaul. They even established a major garrison in Sicily in case the Seleucids ever got to Italy. This fear was shared by Rome's Greek allies, who had largely ignored Rome in the years after the Second Macedonian War, but now followed Rome again for the first time since that war. A major Roman-Greek force was mobilized under the command of the great hero of the Second Punic War, Scipio Africanus, and set out for Greece, beginning the Roman-Syrian War. After initial fighting that revealed serious Seleucid weaknesses, the Seleucids tried to turn the Roman strength against them at the Battle of Thermopylae (as they believed the 300 Spartans had done centuries earlier). Like the Spartans, the Seleucids lost the battle, and were forced to evacuate Greece. The Romans pursued the Seleucids by crossing the Hellespont, which marked the first time a Roman army had ever entered Asia. The decisive engagement was fought at the Battle of Magnesia, resulting in a complete Roman victory. The Seleucids sued for peace, and Rome forced them to give up their recent Greek conquests. Though they still controlled a great deal of territory, this defeat marked the beginning of the end of their empire, as they were to begin facing increasingly aggressive subjects in the east (the Parthians) and the west (the Greeks). Their empire disintegrated into a rump over the course of the next century, when it was eclipsed by Pontus. Following Magnesia, Rome once again withdrew from Greece, assuming (or hoping) that the lack of a major Greek power would ensure a stable peace. In fact, it did the opposite.
In 179 BC Philip died. His talented and ambitious son, Perseus, took the throne and showed a renewed interest in conquering Greece. With her Greek allies facing a major new threat, Rome declared war on Macedonia once again, starting the Third Macedonian War. Perseus initially had some success against the Romans. However, Rome responded by sending another, stronger, army. This second consular army decisively defeated the Macedonians at the Battle of Pydna in 168 BC and the Macedonians duly capitulated, ending the war. Convinced now that the Greeks (and therefore the rest of the region) would never have peace if Greece were left alone yet again, Rome decided to establish its first permanent foothold in the Greek world. The Kingdom of Macedonia was divided by the Romans into four client republics. Even this proved insufficient to ensure peace, as Macedonian agitation continued. The Fourth Macedonian War, 150 to 148 BC, was fought against a Macedonian pretender to the throne who was again destabilizing Greece by attempting to re-establish the old kingdom. The Romans swiftly defeated the Macedonians at the Second battle of Pydna. The Achaean League chose this moment to fight Rome but was swiftly defeated. In 146 BC (the same year as the destruction of Carthage) Corinth was besieged and destroyed, which led to the league's surrender. After nearly a century of constant crisis management in Greece, which always led back to internal instability and war when she withdrew, Rome decided to divide Macedonia into two new Roman provinces, Achaea and Epirus.
Late Republic (147–30 BC)
Jugurthine War (111–104 BC)
The Jugurthine War of 111–104 BC was fought between Rome and Jugurtha of the North African kingdom of Numidia. It constituted the final Roman pacification of Northern Africa, after which Rome largely ceased expansion on the continent after reaching natural barriers of desert and mountain. Following Jugurtha's usurpation of the throne of Numidia, a loyal ally of Rome since the Punic Wars, Rome felt compelled to intervene. Jugurtha impudently bribed the Romans into accepting his usurpation. Jugurtha was finally captured not in battle but by treachery.
The Celtic threat (121 BC) and the new Germanic threat (113–101 BC)
In 121 BC, Rome came into contact with two Celtic tribes (from a region in modern France), both of which they defeated with apparent ease. The Cimbrian War (113–101 BC) was a far more serious affair than the earlier clashes of 121 BC. The Germanic tribes of the Cimbri and the Teutons migrated from northern Europe into Rome's northern territories, and clashed with Rome and her allies. At the Battle of Aquae Sextiae and the Battle of Vercellae both tribes were virtually annihilated, which ended the threat.
Internal unrest (135–71 BC)
The extensive campaigning abroad by Roman generals, and the rewarding of soldiers with plunder on these campaigns, led to a general trend of soldiers becoming increasingly loyal to their generals rather than to the state. Rome was also plagued by several slave uprisings during this period, in part because vast tracts of land had been given over to slave farming in which the slaves greatly outnumbered their Roman masters. In the 1st century BC at least twelve civil wars and rebellions occurred. This pattern continued until 27 BC, when Octavian (later Augustus) successfully challenged the Senate's authority, and was made princeps (first citizen).
Between 135 BC and 71 BC there were three "Servile Wars" involving slave uprisings against the Roman state. The third and final uprising was the most serious, involving ultimately between 120,000 and 150,000 slaves under the command of the gladiator Spartacus. In 91 BC the Social War broke out between Rome and its former allies in Italy when the allies complained that they shared the risk of Rome's military campaigns, but not its rewards. Although they lost militarily, the allies achieved their objectives with legal proclamations which granted citizenship to more than 500,000 Italians.
The internal unrest reached its most serious state, however, in the two civil wars that were caused by the consul Lucius Cornelius Sulla at the beginning of 82 BC. In the Battle of the Colline Gate at the very door of the city of Rome, a Roman army under Sulla bested an army of the Roman Senate and entered the city. Sulla's actions marked a watershed in the willingness of Roman troops to wage war against one another that was to pave the way for the wars which ultimately overthrew the Republic, and caused the founding of the Roman Empire.
Conflicts with Mithridates (89–63 BC) and the Cilician pirates (67 BC)
Mithridates the Great was the ruler of Pontus, a large kingdom in Asia Minor (modern Turkey), from 120 to 63 BC. Mithridates antagonised Rome by seeking to expand his kingdom, and Rome for her part seemed equally eager for war and the spoils and prestige that it might bring. In 88 BC, Mithridates ordered the killing of a majority of the 80,000 Romans living in his kingdom. The massacre was the official reason given for the commencement of hostilities in the First Mithridatic War. The Roman general Lucius Cornelius Sulla forced Mithridates out of Greece proper, but then had to return to Italy to answer the internal threat posed by his rival, Gaius Marius. A peace was made between Rome and Pontus, but this proved only a temporary lull.
The Second Mithridatic War began when Rome tried to annex a province that Mithridates claimed as his own. In the Third Mithridatic War, first Lucius Licinius Lucullus and then Pompey the Great were sent against Mithridates. Mithridates was finally defeated by Pompey in the night-time Battle of the Lycus.
The Mediterranean had at this time fallen into the hands of pirates, largely from Cilicia. The pirates not only strangled shipping lanes but also plundered many cities on the coasts of Greece and Asia. Pompey was nominated as commander of a special naval task force to campaign against the pirates. It took Pompey just forty days to clear the western portion of the sea of pirates and restore communication between Iberia (Spain), Africa, and Italy.
Caesar's early campaigns (59–50 BC)
During his term as praetor in the Iberian Peninsula (modern Portugal and Spain), Pompey's contemporary Julius Caesar defeated two local tribes in battle. After his term as consul in 59 BC, he was appointed to a five-year term as the proconsular Governor of Cisalpine Gaul (part of current northern Italy), Transalpine Gaul (current southern France) and Illyria (part of the modern Balkans). Not content with an idle governorship, Caesar strove to find reason to invade Gaul (modern France and Belgium), which would give him the dramatic military success he sought. When two local tribes began to migrate on a route that would take them near (not into) the Roman province of Transalpine Gaul, Caesar had the barely sufficient excuse he needed for his Gallic Wars, fought between 58 BC and 49 BC.
Caesar defeated large armies at major battles 58 and 57 BC. In 55 and 54 BC he made two expeditions into Britain, the first Roman to do so. Caesar then defeated a union of Gauls at the Battle of Alesia, completing the Roman conquest of Transalpine Gaul. By 50 BC, all of Gaul lay in Roman hands. Gaul never regained its Celtic identity, never attempted another nationalist rebellion, and, except for the Crisis of the Third Century, remained loyal to Rome until the fall of the western empire in 476.
Triumvirates and Caesarian ascension (53–30 BC)
By 59 BC an unofficial political alliance known as the First Triumvirate was formed between Gaius Julius Caesar, Marcus Licinius Crassus, and Gnaeus Pompeius Magnus ("Pompey the Great") to share power and influence. In 53 BC, Crassus launched a Roman invasion of the Parthian Empire (modern Iraq and Iran). After initial successes, he marched his army deep into the desert; but here his army was cut off deep in enemy territory, surrounded and slaughtered at the Battle of Carrhae in which Crassus himself perished. The death of Crassus removed some of the balance in the Triumvirate and, consequently, Caesar and Pompey began to move apart. While Caesar was fighting in Gaul, Pompey proceeded with a legislative agenda for Rome that revealed that he was at best ambivalent towards Caesar and perhaps now covertly allied with Caesar's political enemies. In 51 BC, some Roman senators demanded that Caesar not be permitted to stand for consul unless he turned over control of his armies to the state, which would have left Caesar defenceless before his enemies. Caesar chose civil war over laying down his command and facing trial.
By the spring of 49 BC, the hardened legions of Caesar crossed the river Rubicon, the legal boundary of Roman Italy beyond which no commander might bring his army, and swept down the Italian peninsula towards Rome, while Pompey ordered the abandonment of Rome. Afterwards Caesar turned his attention to the Pompeian stronghold of Hispania (modern Spain) but decided to tackle Pompey himself in Greece. Pompey initially defeated Caesar, but failed to follow up on the victory, and was decisively defeated at the Battle of Pharsalus in 48 BC, despite outnumbering Caesar's forces two to one, albeit with inferior quality troops. Pompey fled again, this time to Egypt, where he was murdered.
Pompey's death did not end the civil war, as Caesar's many enemies fought on. In 46 BC Caesar lost perhaps as much as a third of his army, but ultimately came back to defeat the Pompeian army of Metellus Scipio in the Battle of Thapsus, after which the Pompeians retreated yet again to Hispania. Caesar then defeated the combined Pompeian forces at the Battle of Munda.
Caesar was now the primary figure of the Roman state, enforcing and entrenching his powers. His enemies feared that he had ambitions to become an autocratic ruler. Arguing that the Roman Republic was in danger, a group of senators hatched a conspiracy and assassinated Caesar at a meeting of the Senate in March 44 BC.  Mark Antony, Caesar's lieutenant, condemned Caesar's assassination, and war broke out between the two factions. Antony was denounced as a public enemy, and Caesar's adopted son and chosen heir, Gaius Octavianus, was entrusted with the command of the war against him. At the Battle of Mutina Mark Antony was defeated by the consuls Hirtius and Pansa, who were both killed.
Octavian came to terms with Caesarians Antony and Lepidus in 43 BC when the Second Triumvirate was formed. In 42 BC Mark Antony and Octavian fought the Battle of Philippi against Caesar's assassins Brutus and Cassius. Although Brutus defeated Octavian, Antony defeated Cassius, who committed suicide. Brutus did likewise soon afterwards.
However, civil war flared again when the Second Triumvirate of Octavian, Lepidus and Mark Antony failed. The ambitious Octavian built a power base of patronage and then launched a campaign against Mark Antony. At the naval Battle of Actium off the coast of Greece, Octavian decisively defeated Antony and Cleopatra. Octavian was granted a series of special powers including sole "imperium" within the city of Rome, permanent consular powers and credit for every Roman military victory, since all future generals were assumed to be acting under his command. In 27 BC Octavian was granted the use of the names "Augustus" and "Princeps", indicating his primary status above all other Romans, and he adopted the title "Imperator Caesar" making him the first Roman Emperor.
The constitutional history of the Roman Republic can be divided into five phases. The first phase began with the revolution which overthrew the monarchy in 509 BC. The final phase ended with the transition that transformed the Republic into what would effectively be the Roman Empire, in 27 BC. Throughout the history of the Republic, the constitutional evolution was driven by the conflict of the orders between the aristocracy and the ordinary citizens.
Patrician Era (509–367 BC)
The last king of the Roman Kingdom, Lucius Tarquinius Superbus, was overthrown in 509 BC by a group of noblemen led by Lucius Junius Brutus. Tarquin made a number of attempts to retake the throne, including the Tarquinian conspiracy, the war with Veii and Tarquinii and finally the war between Rome and Clusium, all of which failed to achieve Tarquin's objectives. The most important constitutional change during the transition from kingdom to republic concerned the chief magistrate. Before the revolution, a king would be elected by the senators for a life term. Now, two consuls were elected by the citizens for an annual term. Each consul would check his colleague, and their limited term in office would open them up to prosecution if they abused the powers of their office. Consular political powers, when exercised conjointly with a consular colleague, were no different from those of the old king.
In 494 BC, the city was at war with two neighboring tribes. The plebeian soldiers refused to march against the enemy, and instead seceded to the Aventine Hill. The plebeians demanded the right to elect their own officials. The patricians agreed, and the plebeians returned to the battlefield. The plebeians called these new officials "plebeian tribunes". The tribunes would have two assistants, called "plebeian aediles". From 375 BC to 371 BC, the republic experienced a constitutional crisis during which the tribunes used their vetoes to prevent the election of senior magistrates. In 367 BC a law was passed which required the election of at least one plebeian aedile each year. In 443 BC, the censorship was created, and in 366 BC, the praetorship was created. Also in 366 BC, the curule aedileship was created. Shortly after the founding of the Republic, the Comitia Centuriata ("Assembly of the Centuries") became the principal legislative assembly. In this assembly, magistrates were elected and laws were passed. During the 5th century BC, a series of reforms were passed. The result of these reforms was that any law passed by the Plebeian Council would have the full force of law. This gave the tribunes (who presided over the Plebeian Council) a positive character for the first time. Before these laws were passed, the only power that the tribunes held was that of the veto.
Conflict of the Orders (367–287 BC)
After the plebeian aedileship had been created, the patricians created the curule aedileship. After the consulship had been opened to the plebeians, the plebeians were able to hold both the dictatorship and the censorship. Plebiscites of 342 BC placed limits on political offices; an individual could hold only one office at a time, and ten years must elapse between the end of his official term and his re-election. Further laws attempted to relieve the burden of debt from plebeians by banning interest on loans. In 337 BC, the first plebeian praetor was elected. During these years, the tribunes and the senators grew increasingly close. The senate realised the need to use plebeian officials to accomplish desired goals. To win over the tribunes, the senators gave the tribunes a great deal of power and the tribunes began to feel obligated to the senate. As the tribunes and the senators grew closer, plebeian senators were often able to secure the tribunate for members of their own families. In time, the tribunate became a stepping stone to higher office.
Around the middle of the 4th century BC, the Plebeian Council enacted the Plebiscitum Ovinium. During the early republic, only consuls could appoint new senators. This initiative, however, extended this power to the censors. It also required the censor to appoint any newly elected magistrate to the senate. By this point, plebeians were already holding a significant number of magisterial offices. Thus, the number of plebeian senators probably increased quickly. However, it remained difficult for a plebeian to enter the senate if he was not from a well-known political family, as a new patrician-like plebeian aristocracy emerged. The old nobility existed through the force of law, because only patricians were allowed to stand for high office. The new nobility existed due to the organization of society. As such, only a revolution could overthrow this new structure.
By 287 BC, the economic condition of the average plebeian had become poor. The problem appears to have centered around widespread indebtedness. The plebeians demanded relief, but the senators refused to address their situation. The result was the final plebeian secession. The plebeians seceded to the Janiculum hill. To end the secession, a dictator was appointed. The dictator passed a law (the Lex Hortensia), which ended the requirement that the patrician senators must agree before any bill could be considered by the Plebeian Council. This was not the first law to require that an act of the Plebeian Council have the full force of law. The Plebeian Council acquired this power during a modification to the original Valerian law in 449 BC. The significance of this law was in the fact that it robbed the patricians of their final weapon over the plebeians. The result was that control over the state fell, not onto the shoulders of voters, but to the new plebeian nobility.
The plebeians had finally achieved political equality with the patricians. However, the plight of the average plebeian had not changed. A small number of plebeian families achieved the same standing that the old aristocratic patrician families had always had, but the new plebeian aristocrats became as uninterested in the plight of the average plebeian as the old patrician aristocrats had always been. The plebeians rebelled by leaving Rome and refusing to return until they had more rights. The patricians then noticed how much they needed the plebeians and accepted their terms. The plebeians then returned to Rome and continued their work.
Supremacy of the New Nobility (287–133 BC)
The Hortensian Law deprived the patricians of their last weapon against the plebeians, and thus resolved the last great political question of the era. No such important political changes occurred between 287 BC and 133 BC. The important laws of this era were still enacted by the senate. In effect, the plebeians were satisfied with the possession of power, but did not care to use it. The senate was supreme during this era because the era was dominated by questions of foreign and military policy. This was the most militarily active era of the Roman Republic.
In the final decades of this era many plebeians grew poorer. The long military campaigns had forced citizens to leave their farms to fight, while their farms fell into disrepair. The landed aristocracy began buying bankrupted farms at discounted prices. As commodity prices fell, many farmers could no longer operate their farms at a profit. The result was the ultimate bankruptcy of countless farmers. Masses of unemployed plebeians soon began to flood into Rome, and thus into the ranks of the legislative assemblies. Their poverty usually led them to vote for the candidate who offered them the most. A new culture of dependency was emerging, in which citizens would look to any populist leader for relief.
From the Gracchi to Caesar (133–49 BC)
The prior era saw great military successes, and great economic failures. The patriotism of the plebeians had kept them from seeking any new reforms. Now, the military situation had stabilised, and fewer soldiers were needed. This, in conjunction with the new slaves that were being imported from abroad, inflamed the unemployment situation further. The flood of unemployed citizens to Rome had made the assemblies quite populist.
Tiberius Gracchus was elected tribune in 133 BC. He attempted to enact a law which would have limited the amount of land that any individual could own. The aristocrats, who stood to lose an enormous amount of money, were bitterly opposed to this proposal. Tiberius submitted this law to the Plebeian Council, but the law was vetoed by a tribune named Marcus Octavius. Tiberius then used the Plebeian Council to impeach Octavius. The theory, that a representative of the people ceases to be one when he acts against the wishes of the people, was counter to Roman constitutional theory. If carried to its logical end, this theory would remove all constitutional restraints on the popular will, and put the state under the absolute control of a temporary popular majority. His law was enacted, but Tiberius was murdered with 300 of his associates when he stood for reelection to the tribunate.
Tiberius' brother Gaius was elected tribune in 123 BC. Gaius Gracchus' ultimate goal was to weaken the senate and to strengthen the democratic forces. In the past, for example, the senate would eliminate political rivals either by establishing special judicial commissions or by passing a senatus consultum ultimum ("ultimate decree of the senate"). Both devices would allow the Senate to bypass the ordinary due process rights that all citizens had. Gaius outlawed the judicial commissions, and declared the senatus consultum ultimum to be unconstitutional. Gaius then proposed a law which would grant citizenship rights to Rome's Italian allies. This last proposal was not popular with the plebeians and he lost much of his support. He stood for election to a third term in 121 BC, but was defeated and then murdered by representatives of the senate with 3,000 of his supporters on Capitoline Hill in Rome. Though the senate retained control, the Gracchi had strengthened the political influence of the plebeians.
The populares and the optimates
In 118 BC, King Micipsa of Numidia (current-day Algeria and Tunisia) died. He was succeeded by two legitimate sons, Adherbal and Hiempsal, and an illegitimate son, Jugurtha. Micipsa divided his kingdom between these three sons. Jugurtha, however, turned on his brothers, killing Hiempsal and driving Adherbal out of Numidia. Adherbal fled to Rome for assistance, and initially Rome mediated a division of the country between the two brothers. Eventually, Jugurtha renewed his offensive, leading to a long and inconclusive war with Rome. He also bribed several Roman commanders, and at least two tribunes, before and during the war. His nemesis, Gaius Marius, a legate from a virtually unknown provincial family, returned from the war in Numidia and was elected consul in 107 BC over the objections of the aristocratic senators. Marius invaded Numidia and brought the war to a quick end, capturing Jugurtha in the process. The apparent incompetence of the Senate, and the brilliance of Marius, had been put on full display. The populares party took full advantage of this opportunity by allying itself with Marius.
Several years later, in 88 BC, a Roman army was sent to put down an emerging Asian power, king Mithridates of Pontus. The army, however, was defeated. One of Marius' old quaestors, Lucius Cornelius Sulla, had been elected consul for the year, and was ordered by the senate to assume command of the war against Mithridates. Marius, a member of the "populares" party, had a tribune revoke Sulla's command of the war against Mithridates. Sulla, a member of the aristocratic ("optimates") party, brought his army back to Italy and marched on Rome. Sulla was so angry at Marius' tribune that he passed a law intended to permanently weaken the tribunate. He then returned to his war against Mithridates. With Sulla gone, the populares under Marius and Lucius Cornelius Cinna soon took control of the city.
During the period in which the populares party controlled the city, they flouted convention by re-electing Marius consul several times without observing the customary ten-year interval between offices. They also transgressed the established oligarchy by advancing unelected individuals to magisterial office, and by substituting magisterial edicts for popular legislation. Sulla soon made peace with Mithridates. In 83 BC, he returned to Rome, overcame all resistance, and recaptured the city. Sulla and his supporters then slaughtered most of Marius' supporters. Sulla, having observed the violent results of radical popular reforms, was naturally conservative. As such, he sought to strengthen the aristocracy, and by extension the senate. Sulla made himself dictator, passed a series of constitutional reforms, resigned the dictatorship, and served one last term as consul. He died in 78 BC.
Pompey, Crassus and the Catilinarian Conspiracy
In 77 BC, the senate sent one of Sulla's former lieutenants, Gnaeus Pompeius Magnus ("Pompey the Great"), to put down an uprising in Spain. By 71 BC, Pompey returned to Rome after having completed his mission. Around the same time, another of Sulla's former lieutenants, Marcus Licinius Crassus, had just put down the Spartacus-led gladiator/slave revolt in Italy. Upon their return, Pompey and Crassus found the populares party fiercely attacking Sulla's constitution. They attempted to forge an agreement with the populares party. If both Pompey and Crassus were elected consul in 70 BC, they would dismantle the more obnoxious components of Sulla's constitution. The two were soon elected, and quickly dismantled most of Sulla's constitution.
Around 66 BC, a movement to use constitutional, or at least peaceful, means to address the plight of various classes began. After several failures, the movement's leaders decided to use any means that were necessary to accomplish their goals. The movement coalesced under an aristocrat named Lucius Sergius Catilina. The movement was based in the town of Faesulae, which was a natural hotbed of agrarian agitation. The rural malcontents were to advance on Rome, and be aided by an uprising within the city. After assassinating the consuls and most of the senators, Catiline would be free to enact his reforms. The conspiracy was set in motion in 63 BC. The consul for the year, Marcus Tullius Cicero, intercepted messages that Catiline had sent in an attempt to recruit more members. As a result, the top conspirators in Rome (including at least one former consul) were executed by authorisation (of dubious constitutionality) of the senate, and the planned uprising was disrupted. Cicero then sent an army, which cut Catiline's forces to pieces.
The most important result of the Catilinarian conspiracy was that the populares party became discredited. The prior 70 years had witnessed a gradual erosion in senatorial powers. The violent nature of the conspiracy, in conjunction with the senate's skill in disrupting it, did a great deal to repair the senate's image.
In 62 BC, Pompey returned victorious from Asia. The Senate, elated by its successes against Catiline, refused to ratify the arrangements that Pompey had made. Pompey, in effect, became powerless. Thus, when Julius Caesar returned from a governorship in Spain in 61 BC, he found it easy to make an arrangement with Pompey. Caesar and Pompey, along with Crassus, established a private agreement, now known as the First Triumvirate. Under the agreement, Pompey's arrangements would be ratified. Caesar would be elected consul in 59 BC, and would then serve as governor of Gaul for five years. Crassus was promised a future consulship.
Caesar became consul in 59 BC. His colleague, Marcus Calpurnius Bibulus, was an extreme aristocrat. Caesar submitted the laws that he had promised Pompey to the assemblies. Bibulus attempted to obstruct the enactment of these laws, and so Caesar used violent means to ensure their passage. Caesar was then made governor of three provinces. He facilitated the election of the former patrician Publius Clodius Pulcher to the tribunate for 58 BC. Clodius set about depriving Caesar's senatorial enemies of two of their more obstinate leaders in Cato and Cicero. Clodius was a bitter opponent of Cicero because Cicero had testified against him in a sacrilege case. Clodius attempted to try Cicero for executing citizens without a trial during the Catiline conspiracy, resulting in Cicero going into self-imposed exile and his house in Rome being burnt down. Clodius also passed a bill that forced Cato to lead the invasion of Cyprus which would keep him away from Rome for some years. Clodius also passed a law to expand the previous partial grain subsidy to a fully free grain dole for citizens.
The end of the First Triumvirate
Clodius formed armed gangs that terrorised the city and eventually began to attack Pompey's followers, who in response funded counter-gangs formed by Titus Annius Milo. The political alliance of the triumvirate was crumbling. Domitius Ahenobarbus ran for the consulship in 55 BC promising to take Caesar's command from him. Eventually, the triumvirate was renewed at Lucca. Pompey and Crassus were promised the consulship in 55 BC, and Caesar's term as governor was extended for five years. Crassus led an ill-fated expedition with legions led by his son, Caesar's lieutenant, against the Kingdom of Parthia. This resulted in his defeat and death at the Battle of Carrhae. Finally, Pompey's wife, Julia, who was Caesar's daughter, died in childbirth. This event severed the last remaining bond between Pompey and Caesar.
Beginning in the summer of 54 BC, a wave of political corruption and violence swept Rome. This chaos reached a climax in January of 52 BC, when Clodius was murdered in a gang war by Milo. On 1 January 49 BC, an agent of Caesar presented an ultimatum to the senate. The ultimatum was rejected, and the senate then passed a resolution which declared that if Caesar did not lay down his arms by July of that year, he would be considered an enemy of the Republic. Meanwhile the senators adopted Pompey as their new champion against Caesar. On 7 January of 49 BC, the senate passed a senatus consultum ultimum, which vested Pompey with dictatorial powers. Pompey's army, however, was composed largely of untested conscripts. On 10 January, Caesar crossed the Rubicon with his veteran army (in violation of Roman laws) and marched towards Rome. Caesar's rapid advance forced Pompey, the consuls and the senate to abandon Rome for Greece. Caesar entered the city unopposed.
The period of transition (49–29 BC)
A period of reform occurred between 49 BC, when Julius Caesar crossed the Rubicon, and 29 BC, when Octavian returned to Rome after Actium. During this period the previous century's gradual unravelling of republican institutions accelerated rapidly. By 29 BC, Rome had completed its transition from a city-state with a network of dependencies to the capital of a world empire.
With Pompey defeated and order restored, Caesar wanted to achieve undisputed control over the government. The powers which he gave himself were later assumed by his imperial successors. His assumption of these powers decreased the authority of Rome's other political institutions.
Caesar held both the dictatorship and the tribunate, and alternated between the consulship and the proconsulship. In 48 BC, Caesar was given permanent tribunician powers. This made his person sacrosanct, gave him the power to veto the senate, and allowed him to dominate the Plebeian Council. In 46 BC, Caesar was given censorial powers, which he used to fill the senate with his own partisans. Caesar then raised the membership of the Senate to 900. This robbed the senatorial aristocracy of its prestige, and made it increasingly subservient to him. While the assemblies continued to meet, he submitted all candidates to the assemblies for election, and all bills to the assemblies for enactment. Thus, the assemblies became powerless and were unable to oppose him.
Near the end of his life, Caesar began to prepare for a war against the Parthian Empire. Since his absence from Rome would limit his ability to install his own consuls, he passed a law which allowed him to appoint all magistrates in 43 BC, and all consuls and tribunes in 42 BC. This transformed the magistrates from representatives of the people to representatives of the dictator.
Caesar's assassination and the Second Triumvirate
Caesar was assassinated on March 15, 44 BC. The assassination was led by Gaius Cassius and Marcus Brutus. Most of the conspirators were senators, who had a variety of economic, political, or personal motivations for carrying out the assassination. Many were afraid that Caesar would soon resurrect the monarchy and declare himself king. Others feared loss of property or prestige as Caesar carried out his land reforms in favor of the landless classes. Virtually all the conspirators fled the city after Caesar's death in fear of retaliation. The civil war that followed destroyed what was left of the Republic.
After the assassination, Mark Antony formed an alliance with Caesar's adopted son and great-nephew, Gaius Octavian. Along with Marcus Lepidus, they formed an alliance known as the Second Triumvirate. They held powers that were nearly identical to the powers that Caesar had held under his constitution. As such, the Senate and assemblies remained powerless, even after Caesar had been assassinated. The conspirators were then defeated at the Battle of Philippi in 42 BC. Eventually, however, Antony and Octavian fought against each other in one last battle. Antony was defeated in the naval Battle of Actium in 31 BC, and he committed suicide with his lover, Cleopatra. In 29 BC, Octavian returned to Rome as the unchallenged master of the Empire and later accepted the title of Augustus ("Exalted One").
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The structural history of the Roman military describes the major chronological transformations in the organisation and constitution of the Roman armed forces. The Roman military was split into the Roman army and the Roman navy, although these two branches were less distinct than they tend to be in modern defence forces. Within the top-level branches of army and navy, structural changes occurred both as a result of positive military reform and through organic structural evolution.
As with most ancient civilizations, Rome's military served the triple purposes of securing its borders, exploiting peripheral areas through measures such as imposing tribute on conquered peoples, and maintaining internal order. From the outset, Rome's military typified this pattern and the majority of Rome's wars were characterized by one of two types. The first is the foreign war, normally begun as a counter-offensive or defense of an ally. The second is the civil war, which plagued the Roman Republic in its final century. Roman armies were not invincible, despite their formidable reputation and host of victories. Over the centuries the Romans "produced their share of incompetents" who led Roman armies into catastrophic defeats. Nevertheless, it was generally the fate of the greatest of Rome's enemies, such as Pyrrhus and Hannibal, to win early battles but lose the war. The history of Rome's campaigning is, if nothing else, a history of obstinate persistence overcoming appalling losses.
Hoplite armies (509 – c. 315 BC)
During this period, Roman soldiers seem to have been modelled after those of the Etruscans to the north, who themselves seem to have copied their style of warfare from the Greeks. Traditionally, the introduction of the phalanx formation into the Roman army is ascribed to the city's penultimate king, Servius Tullius (ruled 578 to 534 BC). According to Livy and Dionysius of Halicarnassus, the front rank was composed of the wealthiest citizens, who were able to purchase the best equipment. Each subsequent rank consisted of those with less wealth and poorer equipment than the one before it.
One disadvantage of the phalanx was that it was only effective when fighting in large, open spaces, which left the Romans at a disadvantage when fighting in the hilly terrain of central Italian peninsula. In the 4th century BC, the Romans abandoned the phalanx in favour of the more flexible manipular formation. This change is sometimes attributed to Marcus Furius Camillus and placed shortly after the Gallic invasion of 390 BC; it is more likely, however, that they were copied from Rome's Samnite enemies to the south, possibly as a result of Samnite victories during the Second Samnite War (326 to 304 BC).
Manipular legion (c. 315 – 107 BC)
During this period, an army formation of around 5,000 men (of both heavy and light infantry) was known as a legion. The manipular army was based upon social class, age and military experience. Maniples were units of 120 men each drawn from a single infantry class.
The maniples were typically deployed into three discrete lines based on the three heavy infantry types:
- 1. Each first line maniple were leather-armoured infantry soldiers who wore a bronze breastplate and a bronze helmet adorned with 3 feathers approximately Script error: No such module "convert". in height and carried an iron-clad wooden shield. They were armed with a sword and two throwing spears.
- 2. The second infantry line was armed and armoured in the same manner as was the first infantry line. The second infantry line, however, wore a lighter coat of mail rather than a solid brass breastplate.
- 3. The third infantry line was the last remnant of the hoplite-style (the Greek-style formation used occasionally during the early Republic) troops in the Roman army. They were armed and armoured in the same manner as were the soldiers in the second line, with the exception that they carried a lighter spear.
The three infantry classes may have retained some slight parallel to social divisions within Roman society, but at least officially the three lines were based upon age and experience rather than social class. Young, unproven men would serve in the first line, older men with some military experience would serve in the second line, and veteran troops of advanced age and experience would serve in the third line.
The heavy infantry of the maniples were supported by a number of light infantry and cavalry troops, typically 300 horsemen per manipular legion. The cavalry was drawn primarily from the richest class of equestrians. There was an additional class of troops who followed the army without specific martial roles and were deployed to the rear of the third line. Their role in accompanying the army was primarily to supply any vacancies that might occur in the maniples. The light infantry consisted of 1,200 unarmoured skirmishing troops drawn from the youngest and lower social classes. They were armed with a sword and a small shield, as well as several light javelins.
Rome's military confederation with the other peoples of the Italian peninsula meant that half of Rome's army was provided by the Socii, such as the Etruscans, Umbrians, Apulians, Campanians, Samnites, Lucani, Bruttii, and the various southern Greek cities. Polybius states that Rome could draw on 770,000 men at the beginning of the Second Punic War, of which 700,000 were infantry and 70,000 met the requirements for cavalry. Rome's Italian allies would be organized in alae, or wings, roughly equal in manpower to the Roman legions, though with 900 cavalry instead of 300.
A small navy had operated at a fairly low level after about 300 BC, but it was massively upgraded about forty years later, during the First Punic War. After a period of frenetic construction, the navy mushroomed to a size of more than 400 ships on the Carthaginian ("Punic") pattern. Once completed, it could accommodate up to 100,000 sailors and embarked troops for battle. The navy thereafter declined in size.
The extraordinary demands of the Punic Wars, in addition to a shortage of manpower, exposed the tactical weaknesses of the manipular legion, at least in the short term. In 217 BC, near the beginning of the Second Punic War, Rome was forced to effectively ignore its long-standing principle that its soldiers must be both citizens and property owners. During the 2nd century BC, Roman territory saw an overall decline in population, partially due to the huge losses incurred during various wars. This was accompanied by severe social stresses and the greater collapse of the middle classes. As a result, the Roman state was forced to arm its soldiers at the expense of the state, which it had not had to do in the past.
The distinction between the heavy infantry types began to blur, perhaps because the state was now assuming the responsibility of providing standard-issue equipment. In addition, the shortage of available manpower led to a greater burden being placed upon Rome's allies for the provision of allied troops. Eventually, the Romans were forced to begin hiring mercenaries to fight alongside the legions.
The legion after the reforms of Gaius Marius (107–27 BC)
In process known as the Marian reforms, Roman consul Gaius Marius carried out a programme of reform of the Roman military. In 107 BC, all citizens, regardless of their wealth or social class, were made eligible for entry into the Roman army. This move formalised and concluded a gradual process that had been growing for centuries, of removing property requirements for military service. The distinction between the three heavy infantry classes, which had already become blurred, had collapsed into a single class of heavy legionary infantry. The heavy infantry legionaries were drawn from citizen stock, while non-citizens came to dominate the ranks of the light infantry. The army's higher-level officers and commanders were still drawn exclusively from the Roman aristocracy.
Unlike earlier in the Republic, legionaries were no longer fighting on a seasonal basis to protect their land. Instead, they received standard pay, and were employed by the state on a fixed-term basis. As a consequence, military duty began to appeal most to the poorest sections of society, to whom a salaried pay was attractive. A destabilising consequence of this development was that the proletariat "acquired a stronger and more elevated position" within the state.
The legions of the late Republic were, structurally, almost entirely heavy infantry. The legion's main sub-unit was called a cohort and consisted of approximately 480 infantrymen. The cohort was therefore a much larger unit than the earlier maniple sub-unit, and was divided into six centuries of 80 men each. Each century was separated further into 10 "tent groups" of 8 men each. The cavalry troops were used as scouts and dispatch riders rather than battlefield cavalry. Legions also contained a dedicated group of artillery crew of perhaps 60 men. Each legion was normally partnered with an approximately equal number of allied (non-Roman) troops.
However, the most obvious deficiency of the Roman army remained its shortage of cavalry, especially heavy cavalry. As Rome's borders expanded and its adversaries changed from largely infantry-based to largely cavalry-based troops, the infantry-based Roman army began to find itself at a tactical disadvantage, particularly in the East.
After having declined in size following the subjugation of the Mediterranean, the Roman navy underwent short-term upgrading and revitalisation in the late Republic to meet several new demands. Under Caesar, an invasion fleet was assembled in the English Channel to allow the invasion of Britannia; under Pompey, a large fleet was raised in the Mediterranean Sea to clear the sea of Cilician pirates. During the civil war that followed, as many as a thousand ships were either constructed or pressed into service from Greek cities.
The Constitution of the Roman Republic was an unwritten set of guidelines and principles passed down mainly through precedent. The Roman constitution was not formal or even official. It was largely unwritten, uncodified, and constantly evolving.
Senate of the Roman Republic
The senate's ultimate authority derived from the esteem and prestige of the senators. This esteem and prestige was based on both precedent and custom, as well as the caliber and reputation of the senators. The senate passed decrees, which were called senatus consulta. These were officially "advice" from the senate to a magistrate. In practice, however, they were usually followed by the magistrates. The focus of the Roman senate was usually directed towards foreign policy. Though it technically had no official role in the management of military conflict, the senate ultimately was the force that oversaw such affairs. The power of the senate expanded over time as the power of the legislative assemblies declined, and the senate took a greater role in ordinary law-making. Its members were usually appointed by Roman Censors, who ordinarily selected newly elected magistrates for membership in the senate, making the senate a partially elected body. During times of military emergency, such as the civil wars of the 1st century BC, this practice became less prevalent, as the Roman Dictator, Triumvir or the senate itself would select its members.
The legal status of Roman citizenship was limited and was a vital prerequisite to possessing many important legal rights such as the right to trial and appeal, to marry, to vote, to hold office, to enter binding contracts, and to special tax exemptions. An adult male citizen with the full complement of legal and political rights was called "optimo jure." The optimo jure elected their assemblies, whereupon the assemblies elected magistrates, enacted legislation, presided over trials in capital cases, declared war and peace, and forged or dissolved treaties. There were two types of legislative assemblies. The first was the comitia ("committees"), which were assemblies of all optimo jure. The second was the concilia ("councils"), which were assemblies of specific groups of optimo jure.
Citizens were organized on the basis of centuries and tribes, which would each gather into their own assemblies. The Comitia Centuriata ("Century Assembly") was the assembly of the centuries (i.e. soldiers). The president of the Comitia Centuriata was usually a consul. The centuries would vote, one at a time, until a measure received support from a majority of the centuries. The Comitia Centuriata would elect magistrates who had imperium powers (consuls and praetors). It also elected censors. Only the Comitia Centuriata could declare war, and ratify the results of a census. It also served as the highest court of appeal in certain judicial cases.
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- Nova Roma – Educational Organization a working historical reconstruction of the Roman Republic
- Roman Empire History
509 BC – 27 BC
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