 The Roosevelt Administration asked Chinese Nationalist president Chiang Kai @-@ shek 's permission to send U.S. observers to visit the CPC . Initially , Chiang was hostile to the proposal and delayed action . The Generalissimo consented after foreign correspondents that he had permitted to visit Yan 'an reported on the CPC to U.S. readers . Chiang agreed after American Vice @-@ President Henry Wallace made a state visit to Chungking , the nationalists ' capital , in late June 1944 . John Carter Vincent , an experienced State Department China expert , assisted Wallace in persuading Chiang to allow the U.S. to visit the CPC in Yan 'an without Nationalist supervision . In exchange , the U.S. promised to replace the American commander of the Burma India Theater , General Stilwell . He was removed from command in October 1944 . 
