 In 1992, the American historian Christopher Browning published a book titled "Ordinary Men" about the Reserve Police Battalion 101, which had been used in 1942 to massacre and round up Jews for deportation to the Nazi death camps in German-occupied Poland.The conclusion of the book, which was much influenced by the Milgram experiment on obedience, was that the men of Unit 101 were not demons or Nazi fanatics but ordinary middle-aged men of working-class background from Hamburg, who had been drafted but found unfit for military duty.In the course of the murderous Operation Reinhard, these men were ordered to round up Jews, and if there was not enough room for them on the trains, to shoot them.