The KLA brought together many Korean guerrilla armies that proliferated in northern Korea, Manchuria and mainland China during the 1920s. After the declaration of war by the Provisional Government against Japan and Germany on December 9, 1941, the units of the KLA participated on the allied side in the Chinese and Southeast Asian theatres. The Regulation regarding the activities of the Korean Liberation Army, imposed by the Chinese Nationalist Government upon the provisional government in 1941, placed the KLA under the supreme authority of the Commander-in-chief of the Chinese army. This regulation was repealed in 1944, after the provisional government had achieved improved financial standing and greater importance in the eyes of the Chinese government. During this period the KLA sent troops to fight alongside British soldiers in the South-East Asian theatre of World War II by request of the British Army, including the outskirts of Burma and India. In 1943, socialist-aligned guerrilla groups joined the KLA, and their leader, General Kim Wonbong, became the deputy commandant of the KLA. Its numbers were continuously boosted by the influx of Koreans escaping from the Japanese army and through the recruitment of Koreans living in China. From its humble beginnings with an officer corps of 30 men at its foundation in 1941, the KLA grew to a substantial force with 339 in active service by the end of the war.
In 1945, the KLA was working in cooperation with the US Office of Strategic Services to train men for specialist military operations within Korea. The leading units were due to depart on August 20, with General Lee in command. The KLA's goal was achieved with the Japanese surrender on September 2, 1945. However, USSR quickly attacked the Japanese force for gained the Northern part of the Korean Peninsula and this decision made the USA use the Atomic bombings of Hiroshima and Nagasaki for gained the early surrender of the Japanese Empire and blocked the USSR attempted strongly influence of Korean Peninsula. On August 15, 1945, the Japanese empire collapsed and the Korea finally gained the Korean Peninsula. This independence was reaffirmed in the Treaty of San Francisco. After the end of World War II, KLA disbanded on June 1946.
Post-war
The members of the KLA returned to Korea during late 1945 and 1946. Many of its members, including Generals Ji and Lee, became part of the South Korean government, while General Kim contributed to the North Korean regime of Kim Il-sung, who himself claimed to have been a KLA commander. There has been a movement in South Korea for years to change the National Armed Forces Day from October 1 to September 17 in honor of the foundation of the Korean Liberation Army in 1941.
