Kunming is the capital and largest city of the province of Yunnan in China. The political, economic, communications and cultural centre of the province, Kunming is also a major tourism centre in China. It is nicknamed the "City of Eternal Spring" for its year-round mild climate. During World War II, Kunming was a Chinese military center and the location of the headquarters for the US Army Forces China-Burma-British Raj. Wujiaba Airport served as the home of the First American Volunteer Group (AVG) of the Republic of China Air Force, nicknamed the Flying Tigers. Kunming was also a transport terminus for the Burma Road.