The Nazi "Einsatzgruppen" were not the only formation tasked with the mass killings. Other formations included the Order Police battalions from Germany (Orpo) participating equally in the mass murder of Polish and Soviet Jews regardless of their age and sex, including in the territories of the formerly Soviet-occupied Poland (see the Red Friday massacre), the Baltic states, and in the USSR proper. Significant numbers of women and children were murdered behind all front lines not only by the Germans but also by the local Ukrainian and Lithuanian auxiliary forces. The largest mass shooting of Soviet Jews took place on September 29, 1941, in the ravine of Babi Yar near Kiev, where 33,771 Jews of all ages were machine-gunned (Situation Report No. 101).