Babi Yar, Rumbula and Stanislaviv-these are places where apocalyptic slaughters were perpetrated during summer 1941. From June 27, 1941, this war erased, like a hurricane, most of the Jewish communities in the Baltic area, in Galicia, in Belorussia, and in Ukraine, with hundreds of thousands of victims. But round-ups in the ghettos and the persecution of Jews were not the only tasks in which the Ordnungspolizei was involved. All along the eastern front, police units were steadily engaged in a fierce antipartisan warfare, as well as in security activities behind the lines and in the surveillance of prisoners of war. Each chapter deals with one of the 145 battalions, including the Series 200 and the esoteric territorial battalions. The text has 42 tables, and a bibliography with more than 200 volumes. There are 100 pictures, including 33 never-published pictures of the PB 72 in Slovenia, taken from the massive photo-album of a platoon leader of the 2/72.