What tactics did Chiang Kai Shek use?

Chiang Kai-shek

In the early hours of April 12, 1927, thousands of thugs from the underworld Green Gang came out of the International Settlement disguised as workers to attack the workers’ armed militia. Pretending to oppose “internal dissension among the workers”, Chiang Kai-shek ordered his troops to disarm the workers and occupy the headquarters of the General Trade Union, where a spurious union composed of underworld figures was immediately set up. Next day the Shanghai workers called a mass rally and demanded the return of their weapons. Unaware that Chiang Kai-shek had turned against the revolution, they went to the General Headquarters of the Northern Expeditionary Army to present their petition, only to be mowed down by machine-gun fire. The blood of hundreds of workers stained the rain-washed streets of Shanghai red. More……

http://www.spartacus.schoolnet.co.uk/2WWchaing.htm

http://korea50.army.mil/history/biographies/shek.shtml

http://en.wikipedia.org/wiki/Chiang_Kai-shek