Political map of South & Southwest Asia 26 March 1931 (Sino-Tibetan War): By the early 1930s, Chiang Kaishek's Nationalists had reunified much of China, encouraging the remaining warlords to side with him. Tibet, whose independence remained unrecognized, soon came into conflict with some of these warlords (Sino-Tibetan War) when it asserted its claim to monasteries on its eastern border. The warlords defeated the Tibetans, eventually agreeing to a truce in 1932.