Operation Mincemeat allowed British intelligence operatives to trick Hitler into thinking that the Allies were about to invade Greece and not Sicily — leaving the Nazis vulnerable and changing the course of World War II. Public Domain The fake soldier, William Martin, was actually the corpse of a Welsh drifter named Glyndwr Michael. Photographed, here, however, is M15 agent Ronnie Reed. On a spring day in 1943, the body of a British soldier holding a briefcase full of classified material washed ashore near Huelva, Spain. The fishermen who found him alerted the Spanish authorities, who notified the Nazis. But the...