Generalissimo Chiang Kai-shek (front right) with Chang Hsueh-liang (“the Young Marshal”), the former warlord of Manchuria, who kidnapped Chiang at Xian in December 1936. The kidnap, which was co-ordinated by Mao, dealt the marginalised Reds back into the game. Behind them stands Chiang Kai-shek’s brother-in-law and confidant H.H. Kung