The military theaters (Chinese: 戰區; pinyin: zhànqū; also called war areas) of the National Revolutionary Army were 76 northern military districts and the largest formations of the National Revolutionary Army, under the Military Affairs Commission, chaired by Chiang Kai-shek during the Second Sino-Japanese War and World War II.
During the Second Sino-Japanese War the National Revolutionary Army eventually organized itself into twelve Military Regions.
In August 1937 there were: As the Japanese advanced, three more military regions were formed and the older ones reassigned on 17 January 1938 following the capture of Nanjing.
Following the Battle of Xuzhou and Northern and Eastern Henan 5th Military Region defended Anhui and Hubei north of the Yangtze River.
It commanded units the 1st and 2nd Army Corps and the Wuhan Garrison, in Jiangxi west of Poyang Lake, southern Hubei and Hunan south of the Yangtze River.