Claire L. Chennault, then a Captain of the Unites States Army Air Corps, retired from active duty in April 1937 and accepted an offer from Madame Chiang Kai-shek for a three month mission to China to make a confidential survey of Chinese Air Force.

At that time China and Japan were on the verge of war and the fledgling Chinese Air Force was beset by internal problem. He attained of combat tactics and the operations of Japanese Air Force over China that laid the ground work for the organization of American Volunteer Group in 1941.

This piece of post stamp was issued by Taiwan in 1990 to memorialize the 50th anniversary of Flying Tiger volunteer for China.