Ma Bufang
A border crisis erupted with Tibet in 1942. Under orders from Chiang, Ma Bufang repaired Yushu airport to prevent Tibetan separatists from seeking independence. Chiang also ordered Ma Bufang to put his Muslim soldiers on alert for an invasion of Tibet in 1942. Ma Bufang complied and moved several thousand troops to the border with Tibet. Chiang also threatened the Tibetans with aerial bombardment if they worked with the Japanese. Ma Bufang attacked the Tibetan Buddhist Tsang monastery in 1941. He also constantly attacked the Labrang monastery.