Mongolia Garrison Army

Japanese Mongolia Garrison Army
Active	December 27, 1937 - July 27, 1946
Country	Empire of Japan
Branch	Imperial Japanese Army
Type	Infantry
Role	Corps
Garrison/HQ	Kalgan
Nickname(s)	Bō (戊^?)
Engagements	Soviet invasion of Manchuria

The Mongolia Garrison Army (駐蒙軍, Chūmōgun^?) was an army of the Imperial Japanese Army during World War II.

The Japanese Mongolia Garrison Army was raised on December 27, 1937 as a garrison force Japanese-dominated Inner Mongolia and adjacent areas of north China. From July 4, 1938, the Mongolia Garrison Army came under the administrative jurisdiction of the North China Area Army. January 1939 the IJA Cavalry Group was added, consisting of the IJA 1st Cavalry Brigade and IJA 4th Cavalry Brigade. In December 1942 the 4th Cavalry Brigade was sent to the Japanese Twelfth Army and the remainder of the Cavalry Group was converted into the IJA 3rd Tank Division.

During most of the Second Sino-Japanese War and due to the Soviet–Japanese Neutrality Pact, the Inner Mongolia was largely a backwater region, and the Mongolia Garrison Army, with its antiquated horse cavalry functioned largely to assist and train the Mengjiang National Army and Mongolian Cavalry Corps. It was thus unprepared for the massive Soviet Red Army armored assault at the end of World War II. The Mongolia Garrison Army was officially disbanded on July 27, 1946. Many of its survivors became Japanese POWs in the Soviet Union.