Green Gang
Fresh from the success of the Northern Expedition against the warlords, Chiang turned on the Communists, who by now numbered in the tens of thousands across China. Chiang ignored the orders of the Wuhan-based left KMT government and marched on Shanghai, a city controlled by Communist militias. As the Communists awaited Chiang's arrival, he loosed the White Terror, massacring 5000 with the aid of the Green Gang. In Beijing, 19 leading Communists were killed by Zhang Zuolin. That May, tens of thousands of Communists and those suspected of being communists were killed, and the CCP lost approximately of its members.