 On October 10, 1945, he participated in a Palmach raid on the Atlit detainee camp to free Holocaust survivors being held by the British authorities as illegal immigrants.The raid freed 208 inmates, among them Yaakov Weiss, who would go on to join the Irgun and eventually be hanged alongside Haviv.About a month after his release from the Palmach, he returned to Jerusalem and began to study Hebrew literature, philosophy, and economics at the Hebrew University of Jerusalem, and at the same time returned to the Irgun.