Not long after the attack on Pearl Harbor, Jim joined the Navy as a crewman in the submarine division. He was assigned to work on the Sea Horse, a standard WWII war submarine.
In his time serving on the Sea Horse, Jim went on three patrols, each time experiencing life in confined spaces. Since each submarine’s life expectancy average was only five runs during the war, there was always the imminent threat of danger and death. In one account, whilst on board Jim survived the one of the worst depth charge onslaughts against a U.S. ship during the war.