Liangping Airport, also known as Liangshan Airport, was a dual-use military and civil airport located north of Liangping District, Chongqing Municipality, China. It served civil flights from July 1988 until May 2003, when these operations were transferred to Wanzhou Wuqiao Airport. The site was originally established as a military base in 1923 by the local 'Lülin' militia for the Sichuanese warlord Yang Sen, and was expanded into an airbase for flight operations under warlord Liu Xiang in 1928–1929. With the outbreak of the War of Resistance-World War II in 1937, Liangshan Airfield was integrated into the Nationalist Air Force of China. It served in the defense of Sichuan and launched fighter escort missions for bombing runs against Japanese positions in Hubei. During the Battle of Chongqing and Chengdu, it was a forward air force base for units such as the 24th PS, 4th PG, which engaged Imperial Japanese Navy Air Force and Army Air Force attacks. After the United States entered World War II, the airport was also used by the United States Army Air Forces Fourteenth Air Force as part of the China Defensive Campaign (1942–1945). It was primarily used by transport units flying C-47 Skytrains for supplies, troops, and equipment, and by unarmed P-38 Lightning photo-reconnaissance aircraft. The 426th Night Fighter Squadron, operating P-61 Black Widow interceptors, defended the airport against enemy aircraft. The Americans closed their facilities at the end of the war. From 1938 to 1945, the airbase was attacked 133 times by Japanese forces, with 7,855 bombs dropped, resulting in over 2,000 military and civilian casualties. The airport was opened to commercial flights in 1988, with routes to cities like Chengdu, Wuhan, Xi'an, Chongqing, and Guangzhou, and had its final commercial flight in May 2003.