Japanese invasion of French Indochina
Following the Japanese invasion of French Indochina, the United States took actions which finally assisted China in her years-long war of resistance against the Imperial Japan aggressions, with the oil and scrap metal embargo and freezing of Japanese assets in the summer of 1941, and along with the Lend-Lease Act of which China was included as a beneficiary on 6 May 1941, the American Volunteer Group (a.k.a. "Flying Tigers") entered the war in December of 1941 with the task of protecting the main Allied supply-line into China; the cross-Himalayan air-route known as ""The Hump"," between the Harbor of Rangoon in Burma, British bases in India, and the Chinese wartime port-of-entry in Kunming, China, and consequently, with the attack on Pearl Harbor, the U.S. officially joined the war against Japan.