Righteous Army
The Japanese-backed forces which entered the region included the Inner Mongolian Army of about 10,000 men and the Grand Han Righteous Army, which was about 6,000 strong. These troops were supported by an unknown number of Japanese "advisers" with small groups of them being embedded in each collaborationist unit. They were opposed by the Chinese Nationalist 35th and 19th Army, as well as some local forces, which in total numbered about 45,000 men.