id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-4404 Military history of the United States during World War II - Wikipedia .html text/html 21523 1966 70 The United States also withdrew from the Washington Naval Treaty limiting naval tonnage in response to Japan's violations of the Nine-Power Treaty and the Kellogg–Briand Pact.[10] Public opposition to Japanese expansionism in Asia had mounted during the Second Sino-Japanese War when the Imperial Japanese Army Air Service attacked and sank the US Yangtze Patrol gunboat USS Panay in the Yangtze River while the ship was evacuating civilians from the Nanjing Massacre.[11] Although the US government accepted Japanese official apologies and indemnities for the incident, it resulted in increasing trade restrictions against Japan and corresponding increases US credit and aid to China. Chennault, a retired US Army Air Corps officer working in the Republic of China since August 1937, first as military aviation advisor to Generalissimo Chiang Kai-shek in the early months of the Sino-Japanese War. Officially known as the 1st American Volunteer Group (AVG) but nicknamed the "Flying Tigers", this was a group of American pilots already serving in the US Armed forces and recruited under presidential authority. ./cache/en-wikipedia-org-4404.html ./txt/en-wikipedia-org-4404.txt