Korean Augmentation to the United States Army (KATUSA) is a scheme of military duty in South Korea. Under this program, soldiers in the South Korean Army are given posts in U.S. Army bases that are located in several places in South Korea. KATUSA soldiers are under the command of both the South Korean Department of Defense and the U.S. Department of Defense. The purpose of the KATUSA program has been different depending on the historical situation in Korea.