泸定桥
Following a divide and conquer tactic, Chiang awarded the local military command of the northern Dadu River region to a smaller Sichuanese warlord, Yang Sen (杨森). Yang Sen had allied with the second largest Sichuanese warlord, Liu Xiang. Together they began fighting against the biggest Sichuanese warlord Liu Wenhui. At the time of the Luding Bridge incident, the region was still under Liu Wenhui's control. Liu Wenhui's troops certainly would not take orders from the lesser rival Yang Sen. Although he received military, political, as well as financial support from Chiang Kai-shek, Yang Sen would not sacrifice his own troops by sending them to help Liu Wenhui stop the communists. Both were well aware of Chiang's divide and conquer strategy, and both held their main forces to prepare for Chiang's potential take-over. Knowing the local opium dependent warlord commanders were incapable of stopping the communist forces, Chiang tried to send more capable officers from his own officer corps to advise the local troops. These attempts were politely but unanimously rejected by all local Sichuanese warlords, as they feared Chiang's takeover.