The First Front Red Army was established the earliest. On August 23, 1930, the First Red Army Corps led by Mao Zedong and Zhu De and the Third Red Army Corps led by Peng Dehuai and Teng Daiyuan met in Yonghe City, Liuyang County, Hunan Province, and decided to The First and Third Red Army Corps were jointly organized into the First Front Army of the Chinese Red Army.

The Fourth Front Army of the Red Army was established on November 7, 1931. The Hubei-Henan-Anhui Central Bureau made the decision to establish the Fourth Front Army of the Red Army in Qiliping, Huang'an (now Hong'an) County, Hubei Province. Xu Xiangqian The commander-in-chief, Chen Changhao serves as the political commissar, and Liu Shiqi serves as the director of the political department.

On July 5, 1935, the Central Revolutionary Military Commission ordered the Second Red Army, the Sixth Red Army and the 32nd Army to form the Second Front of the Red Army. He Long was appointed as the commander-in-chief, Ren Bi was appointed as the political commissar, and Xiao Ke was appointed as the deputy commander-in-chief. Guan Xiang should be appointed deputy political commissar.

Extended information:

The First Red Front Army, the Second Red Front Army and the Fourth Red Front Army were not uniformly established based on organizational relationships, but were each formed in the practice of war. This was mainly determined by the revolutionary war situation and the special historical conditions of army construction at that time.

After the full-scale Anti-Japanese War broke out, the three main forces of the Red Army were reorganized into the Eighth Route Army of the National Revolutionary Army, and there was no need to reorganize the Third Front Army of the Red Army.

The 115th Division is mainly composed of the Red 15th Army, the 15th Red Army and the Northern Shaanxi Red 74th Division; the 115th Division is composed of the 2nd Red Army, the 2nd and 6th Army and the Northern Shaanxi Red Army. The 27th, 28th, 32nd Corps, the 1st and 2nd Independent Divisions, the Headquarters Special Agent Regiment and other units were organized into the 120th Division.

The 129th Division is mainly composed of the Fourth Front Army of the Red Army, the 29th, 30th Army, and the 15th Army Cavalry Regiment of the Northern Shaanxi Red Army, and the 4 independent regiments of Shaanxi, Gansu and Ningxia. Each rushed to the anti-Japanese battlefield.

Reference materials: Baidu Encyclopedia - The Fourth Front Army of the Chinese Workers' and Peasants' Red Army

Reference materials: Baidu Encyclopedia - The First Front Army of the Chinese Workers' and Peasants' Red Army

Reference materials: Baidu Encyclopedia-Second Front Army of the Chinese Workers' and Peasants' Red Army