The Soviet Union occupied Lvov in September 1939, according to secret provisions of the German-Soviet Pact. Germany invaded the Soviet Union on June 22, 1941, occupying Lvov within a week. The Germans claimed that the city's Jewish population had supported the Soviets. Ukrainian mobs went on a rampage against Jews. They stripped and beat Jewish women and men in the streets of Lvov. Ukrainian partisans supported by German authorities killed about 4,000 Jews in Lvov during this pogrom. US forces discovered this 8mm footage in SS barracks in Augsberg, Germany, after the war.