A report on Shaanxi, Sichuan and Long March

Officially part of Northwest China, it borders the province-level divisions of Shanxi (NE, E), Henan (E), Hubei (SE), Chongqing (S), Sichuan (SW), Gansu (W), Ningxia (NW) and Inner Mongolia (N).

However, the most famous began in the Jiangxi (Jiangxi) province in October 1934 and ended in the Shaanxi province in October 1935.

Sichuan neighbors the Qinghai to the northwest, Gansu to the north, Shaanxi to the northeast, Chongqing to the east, Guizhou to the southeast, Yunnan to the south, and the Tibet Autonomous Region to the west.

In the Republican era of China, the city of Yan'an was near the endpoint of the Long March which destroyed the Chinese Soviet Republic in Jiangxi by the Kuomintang armies, and became the birthplace of the Chinese Communist Revolution from late 1935 to early 1947 and the Communists formed the Shaan-Gan-Ning Border Region in constituent parts of Shaanxi.

When several smaller units formed the Fourth Red Army under Zhang Guotao in the Sichuan–Shaanxi border area, no standard nomenclature of the armies of the CCP existed; moreover, during the Chinese Civil War, central control of separate Communist-controlled enclaves within China was limited.

The Second Sino-Japanese War was soon followed by the resumed Chinese Civil War, and the cities of East China are obtained by the Communists one after another, the Kuomintang government again tried to make Sichuan its stronghold on the mainland, although it already saw some Communist activity since it was one area on the road of the Long March.