홍군
During the Second Sino-Japanese war (1937–1945), the CCP and KMT were temporarily in alliance to fight their common enemy. The Communist government moved from Bao'an (Pao An) to Yan'an (Yenan) in December 1936. The Chinese Workers' and Peasants' Red Army became army groups belonging to the national army (8th route army and New 4th Army), and the Soviet Republic of China changed its name as a special Shaan-Gan-Ning administration region (named after the Shaanxi-Gansu-Ningxia provinces at the borders of each it was located). However, essentially the army and the region controlled by CCP remained independent from the KMT's government.