Following the attack on Pearl Harbor, Ralph Yempuku served with the Hawaii Territorial Guard and the Varsity Victory Volunteers before joining the 442nd Regimental Combat Team. During his training, the Office of Strategic Services, the CIA’s precursor, recruited him. Yempuku was one of only a few Americans to parachute behind enemy lines into Burma with OSS Detachment 101. He worked with guerrillas to ambush and harass the Japanese. The Japanese even offered a $20,000 bounty for his head.