The First American Volunteer Group (AVG) of the Republic of China Air Force in 1941–1942, nicknamed the Flying Tigers, was composed of pilots from the United States Army Air Corps (USAAC), Navy (USN), and Marine Corps (USMC), recruited under President Franklin Roosevelt's authority before Pearl Harbor and commanded by Claire Lee Chennault. Their Curtis P-40B Warhawk aircraft, marked with Chinese colors, flew under American control. Their mission was to bomb Japan and defend the Republic of China, but many delays meant the AVG flew in combat after the US and Japan declared war.