The South Chahar Autonomous Government was a puppet state of the Empire of Japan, as well as an administratively autonomous component of Mengjiang from its creation in 1937 to its complete merger in 1939. Following the Japanese invasion of China in July 1937, regional governments were established in Japanese-occupied territories. After Operation Chahar in September 1937, which extended Japanese control to northern Shanxi region, more formal control of the area was established through the creation of the North Shanxi Autonomous Government, as well as the South Chahar Autonomous Government to the east of Shanxi.