Chinchow Operation

In late November 1931, General Honjō dispatched 10,000 soldiers in 13 armored trains, escorted by a squadron of bombers, in an advance on Chinchow from Mukden. This force had advanced to within 30 kilometers of Chinchow, when it received an order to withdraw. The operation was cancelled by Japanese War Minister General Jirō Minami, due to the acceptance of modified form of a League of Nations proposal for a "neutral zone" to be established as a buffer zone between China proper and Manchuria pending a future China-Japanese peace conference by the civilian government of Prime Minister Reijiro Wakatsuki in Tokyo.

http://city.chinaassistor.com/Shenyang/2008/071...