By the time the Jews found out that they were there the squads would have already rounded them all up. Containing Jewish Men, Woman and children, they would also take any Communist party leaders or Gypsies. The Einsatzgruppen murdered more than 1 million people, almost all civilians. The Einsatzgruppen operated throughout the territory occupied by the German armed forces following the German invasions on Poland in September in 1939 of the Soviet Union in June 1941. They had operations ranging from the murder of a few people to operations that would last two or more days e. g. Babi Yar (33,771 killed in two days) and Rumbula (25,000 killed in two days). Raul Hilberg estimates that between 1941 and 1945 the Einsatzgruppen and the SS killed more than 1. 3 million Jews, Gypsies and Soviet political commissars. In some cases the Einsatzgruppen would demand that the Jews were to dig big holes, the Jews would then later be executed and the big holes would be their graves. There was roughly 200 executions were occurring daily. In the first couple of weeks of the Polish campaign the Einsatzgruppen carried out more than 10,000 arrests.
On the 3 September 1939 Heinrich Himmler ordered them to shoot all insurgents, mass shooting were carried out by the Einsatzgruppen, police and troops. By September 10 340 – 540 Polish civilians had been shot in the town. The Einsatzgruppen were special SS mobile formations tasked with carrying out the mass murder of Jews, communist functionaries, and others deemed unfit to live by the Nazis. Sometimes, the killing squads did not even have to do the dirty work. Before they arrived, local residents had already taken the law into their own hands and decided to kill all the local Jews that they could find.