Units of Mongolian People's Army were supported and allied with the Soviet Red Army in the Battle of Khalkhin Gol in 1939 and on the western flank of the Soviet invasion of Manchuria in 1945. Domestically, it took part in the suppression of the 1932 armed uprising. It also involved in many border conflicts against Manchukuo and the Kwantung Army (one of the largest parts of the Imperial Japanese Army) and the Chinese National Revolutionary Army. The Imperial Japanese Army recorded 152 minor incidents on the border of Manchuria between 1932 and 1934. The number of incidents increased to over 150 per year in 1935 and 1936, and the scale of incidents became larger.