United States Civil Administration of the Ryukyu Islands
Following the United States invasion of Okinawa during WWII, the U.S. installed the United States Military Government of the Ryukyu Islands. Pursuant to a treaty with the Japanese government(Message of Emperor), in 1950 the United States Civil Administration of the Ryukyu Islands took over and ruled Okinawa and the rest of the Ryukyu Islands until 1972. During this "trusteeship rule," the U.S. built numerous military bases, including bases that operated nuclear weapons. U.S. rule was opposed by many local residents, creating the Ryukyu independence movement that struggled against U.S. rule.