"Big Boss was born of Japanese-American descent, in Hawaii. The entire American side of his family had perished during the Japanese attacks on Pearl Harbor. While his Japanese relatives were locked up in internment camps, he joined the 442nd Infantry Regiment in his teens. Big Boss gained his first combat experience fighting in France, where his unit had contributed to freeing towns from Nazi control in 1944. After returning to America after the war, he lost patriotism for his country, due to prejudice towards his Japanese heritage. Big Boss later participated as a mercenary for France in the Congo Crisis, from 1961 to 1968, later serving in wars in Asia, Africa, and the Middle/Far East. He also specifically chose missions that related to people's liberation, even declining various missions from an abundance of governments, military organizations, and terrorist groups that were well-paid. His sterility was diagnosed due to various battlefield injuries, and that he covertly agreed with the U.S. Government to participate in the Les Enfants Terribles."