Joachim Hamann (18 May 1913 in Kiel – 13 July 1945) was an officer of the Einsatzkommando 3, a killing unit of Einsatzgruppe A, responsible for thousands of Jewish deaths in Lithuania. Hamann organized and commanded Rollkommando Hamann, a small mobile killing unit composed of 8–10 Germans and several dozens of local Lithuanian collaborators.
Hamann was of Baltic German parentage. Trained as a chemist, he had difficulties finding a job due to the Great Depression. He joined SA in August 1931, NSDAP in December 1932, and SS in July 1938. He served in the Wehrmacht during the invasion of Poland and Battle of France as a paratrooper (Fallschirmjäger). He returned to Berlin where he joined the SS and completed training courses. In March 1941, he was promoted to SS-Obersturmführer (First Lieutenant). After the Nazi invasion of the Soviet Union, Hamann organized and commanded Rollkommando Hamann which killed at least 39,000 Jews in various locations across Lithuania and 9,102 people, almost all of whom were Jews, from the Daugavpils Ghetto. Hamann's superior, Karl Jäger, documented these killings in the Jäger Report.
Hamann left Lithuania in October 1941 and continued his SS career. In 1942, SS-Hauptsturmführer Hamann participated in the Operation Zeppelin, a scheme to recruit Soviet POWs for espionage behind Russian lines. From 1943 he worked at Amt IV of RSHA (Gestapo). He was involved in apprehending and executing suspected members of the 20 July plot to assassinate Hitler. He was appointed aide to Ernst Kaltenbrunner, Director of the Reich Main Security Office. In January 1945, Hamann was promoted to SS-Sturmbannführer.
After the war, Hamann committed suicide.
- Bubnys, Arūnas (2004). "The Holocaust in Lithuania: An Outline the Major Stages and their Results". In Nikžentaitis, Alvydas. The Vanished World of Lithuanian Jews. Rodopi. p. 210. ISBN 9789042008502.
- Voren, Robert van (2011). Undigested Past: The Holocaust in Lithuania. Rodopi. p. 76. ISBN 9789401200707.
- Stang, Knut (1996). Kollaboration und Massenmord: die litauische Hilfspolizei, das Rollkommando Hamann und die Ermordung der litauischen Juden. Lang. pp. 153–54. ISBN 9783631308950.
- Aly, Götz; Hoppe, Bert, eds. (2011). Sowjetunion mit annektierten Gebieten I: Besetzte sowjetische Gebiete unter deutscher Militärverwaltung, Baltikum und Transnistrien. Oldenbourg Verlag. p. 531. ISBN 9783486589115.
- Ezergailis, Andrew (1996). The Holocaust in Latvia 1941-1944: The Missing Center. Riga: Historical Institute of Latvia. pp. 276–279. ISBN 9984-9054-3-8.
- Melamed, Joseph A. "The Mechanized Commando Unit of Haman". Association of Lithuanian Jews in Israel. Retrieved 2014-10-12.
- Muñoz, Antonio J. (2000). The Druzhina SS Brigade: A History, 1941-1943. Axis Europa Books. p. 16. ISBN 9781891227370.