Babi Yar (, Babyn Yar or Babin Yar; , Babiy Yar) is a ravine in the Ukrainian capital Kyiv and a site of massacres carried out by German forces during their campaign against the Soviet Union in World War II. The first and best documented of the massacres took place on 29–30 September 1941, killing approximately 33,771 Jews. The decision to kill all the Jews in Kyiv was made by the military governor Generalmajor Kurt Eberhard, the Police Commander for Army Group South, SS-"Obergruppenführer" Friedrich Jeckeln, and the "Einsatzgruppe" C Commander Otto Rasch. Sonderkommando 4a soldiers, along with the aid of the SD and SS Police Battalions with the Ukrainian Auxiliary Police backed by the Wehrmacht, carried out the orders.