Taichung International Airport (Chinese: 臺中國際機場) (IATA: RMQ, ICAO: RCMQ), is an international airport located in Taichung, Taiwan, which is used for both commercial and military purposes. It is also the third international airport in Taiwan, with scheduled services to China, Hong Kong, Japan, Macao, South Korea, Thailand and Vietnam.Taichung International Airport was constructed during the era of Japanese rule and was named Kōkan Airport (Japanese: 公館空港). The United States Air Force (USAF) had been garrisoning the base with two fighter squadrons until the Sino-American Mutual Defense Treaty came into force on March 3, 1955.