At least how many Jews was the unit Joachim Hamann commanded responsible for killing?
Joachim Hamann: 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. Joachim Hamann:  Hamann organized and commanded "Rollkommando" Hamann, a small mobile killing unit composed of 8–10 Germans and several dozens of local Lithuanian collaborators.
i don't know