The Bloody Sunday massacre of 12 October 1941 was the single largest massacre of Polish Jews perpetrated by the uniformed police in the General Government prior to genocidal '' Aktion Reinhardt '' of 1942 . It was preceded by the Red Friday massacre of 5,000 Jews in the Białystok Ghetto on 27 – 28 June 1941 by the Police Battalion 309 , but surpassed only by the Police Battalion 45 massacre of 33,000 Jews at Babi Yar in '' Reichskommissariat Ukraine '' outside Kiev on 29 – 30 September 1941 ; and the final '' Aktion Erntefest '' massacre of more than 43,000 Jews at the Majdanek concentration camp and its subcamps on 3 November 1943 perpetrated by the Trawniki men from Ukraine along with the Reserve Police Battalion 101 of the German Order Police from Hamburg
Aktion Erntefest
Aktion Erntefest
Stanisławów Ghetto