on high-altitude bombardment. Chennault retired from the United States Army in 1937, and went to work as an aviation adviser and trainer in China.

Starting in early 1941, Chennault commanded the 1st American Volunteer Group (nicknamed Flying Tigers). He headed both the volunteer group and the uniformed U.S. Army Air Forces units that replaced it in 1942. He feuded constantly with General Joseph Stilwell, the U.S. Army commander in China, and helped China's