One bright day in April 1956, Moshe Dayan, the one-eyed chief of staff of the Israel Defense Forces (IDF), drove south to Nahal Oz, a recently established kibbutz near the border of the Gaza Strip. Dayan came to attend the funeral of 21-year-old Roi Rotberg, who had been murdered the previous morning by Palestinians while he was patrolling the fields on horseback. The killers dragged Rotberg’s body to the other side of the border, where it was found mutilated, its eyes poked out. The result was nationwide shock and agony.