Why is Zhu Mao's army in Jinggangshan called the Fourth Army?

Zhu Mao's army in Jinggangshan is called the Fourth Army;

1in mid-April, 928, Zhu De and Chen Yi led a part of the peasant armed forces left by the Nanchang Uprising and the Southern Hunan Uprising to Jinggangshan, where they joined forces with the revolutionary army of workers and peasants led by Mao Zedong. The troops were co-edited as the Fourth Army of the Chinese Workers and Peasants Revolutionary Army, later renamed as the Fourth Army of the Red Army, with Zhu De as the commander, Mao Zedong as the party representative and Chen Yi as the director of the political department. This is the first team named after the Red Army. According to an interview with Zhu De in edgar snow's Red Star over China, Zhu De said: "Therefore, this name is used to maintain the name of the Fourth Army of the Kuomintang, which is the fortress of our revolution in the Great Revolution. What kind of army is the Kuomintang Fourth Army? In the Great Revolution initiated by China * * * cooperation for the first time, Ye Ting Independent Regiment and its Fourth Army made outstanding achievements, wiped out the main force of Wu, and made the revolutionary forces develop in the same region, thus winning the glorious title of "Iron Army". It can be seen that the Fourth Army is not a serial number, but an honorary title. It is to inherit and carry forward the glorious tradition of the "Iron Army" of the Kuomintang Fourth Army.

The Fourth Army of the Chinese Workers and Peasants Red Army, referred to as the "Red Fourth Front Army" for short. During the Agrarian Revolutionary War, the Red Army had three fourth-front armies: (1) Jinggangshan Red Fourth Army. 1June, 928, renamed by the Fourth Army of the Workers and Peasants Revolutionary Army. After that, he participated in the first, second, third and fourth counter-campaigns against "encirclement and suppression" in the Central Soviet Area. 1June, 933, reduced to the second division of the first legion. (2) The "Red Fourth Front Army" in western Hunan and Hubei. 1In July, 928, the Sangzhi Uprising Armed Forces in Northwest Hunan were reorganized into the Fourth Army of the Workers and Peasants Revolutionary Army. July 1930, changed to the second army. (3) The "Red Fourth Front Army" in Hubei, Henan and Anhui. 193 1 year 1 month compiled by the 1st and 15th Army Corps of the Red Army. After its establishment, it participated in the second, third and fourth counter-campaigns against "encirclement and suppression" and the Long March in the Hubei, Henan and Anhui Soviet areas. 1August, 937, reorganized as the 385th Brigade of the Eighth Route Army.

1on April 28th, 928, Zhu De and Chen Yi led the rest of the Nanchang Uprising, the Southern Hunan Uprising Agricultural Army and the 1st Division of the Revolutionary Army of Workers and Peasants led by Mao Zedong joined forces in Ninggang, Jinggangshan. According to the decision of the Southern Hunan Special Committee, Zhu and Mao co-edited into the Fourth Army.