Fresh from establishing the People's Republic, the new Maoist government of mainland China began to provide logistical support to the insurgents short of actually supplying troops, something that China would do during the war in Korea, which would start in late June 1950. Communist expansion into what remained of "free" South-East Asia (apart from Japan, which was still under U.S. occupation at the time) seemed inevitable, and so the U.S. government under Harry S. Truman began to revise their position. In March, General Hartmann, who commanded the "Armée de l'Air" in Indochina until his death in an air crash in April 1951, wanted to create a "Battle Air Corps" composed of four fighter, two bomber and four transport groups. Jets were in service with the U.S. Air Force and the U.S. Navy at this time, yet Hartmann believed that they were actually not up to the task of dealing with insurgents as opposed to fighting conventional armies on the ground.