On September 29-30, 1941, the Nazis massacre civilians at Babi Yar, near Kiev. Approximately 33,771 Jews were murdered. From the article:
"On September 29-30, 1941, SS and German police units and their auxiliaries, under guidance of members of Einsatzgruppe C, murdered the Jewish population of Kiev at Babi Yar, a ravine northwest of the city. This was one of the largest mass murders at an individual location during World War II. As the victims moved into the ravine, Einsatzgruppe detachments shot them in small groups. According to reports by the Einsatzgruppe to headquarters, 33,771 Jews were massacred in two days. In the months following the massacre, German authorities stationed at Kiev killed thousands more Jews at Babi Yar, as well as non-Jews including Roma (Gypsies), Communists, and Soviet prisoners of war. It is estimated that some 100,000 people were murdered at Babi Yar.
The Soviet army liberated Kiev on November 6, 1943."