Answer
Stilwell was sent to China to get the Communists and Nationalists to cooperate against Japan. The Communists and Nationalists had been fighting a civil war since the 1920s. Stilwell believed that the only way to defeat Japan was for the Communists and Nationalists to work together. However, the Communists and Nationalists were reluctant to cooperate. The Communists did not trust the Nationalists, and the Nationalists did not trust the Communists.