New Fourth Army

The New Fourth Army (N4A; simplified Chinese: 新四军; traditional Chinese: 新四軍; pinyin: Xīn Sì Jūn) was a military unit nominally under the banner of the National Revolutionary Army (NRA) of the Republic of China, established in 1937 as part of the Second United Front against Japan.

However, in practice, the New Fourth Army was under the exclusive command of the Chinese Communist Party (CCP) and operated independently of the Kuomintang (KMT) central military command. Unlike most NRA units, which were directly overseen by the Nationalist Government, the N4A maintained separate political and operational structures aligned with CCP objectives.

The New Fourth Army and the Eighth Route Army were the two main communist forces from 1938. The New Fourth Army was active south of the Yangtze River (Chang Jiang), while the Eighth Route Army was based in Yan'an in the northwest.

Members of the New Fourth Army wore their badges on the left arm, with "N4A" and the soldier's unit and name listed on the badge.

After the Xi'an Incident, the Kuomintang led by Chiang Kai-shek and the Chinese Communist Party led by Mao Zedong formed a United Front against Japan, which was already in control of Manchuria and pushing into North China. The Marco Polo Bridge Incident in July 1937 marked the beginning of the Sino-Japanese War (1937–1945).

In October 1937, an announcement was made that Red Army soldiers active in the eight provinces in southern China — those who did not embark on the Long March would be part of the New Fourth Army. The New Fourth Army was established on December 25, 1937 in Hankou, moving to Nanchang on January 6, 1938, when the detachments began marching to the battlefront. At the beginning, the New Fourth Army had four detachments and one task force battalion and numbered roughly ten thousand. Later the army moved to Anhui province. Ye Ting was the army commander, Xiang Ying the deputy army commander.

It was in theory a united front against Japan but in practice there was friction between Nationalist and Communist Forces, which intensified in the fall of 1940, culminating in the New Fourth Army Incident with a full-fledged battle between the New Fourth Army and KMT National Revolutionary Army forces. Up until that point, most of the battles had been skirmishes. The army was fully reorganised after the incident and remained in active combat until the end of the war.

In 1938 the 1st, 2nd and 3rd detachments began marching to the battlefront in southern Anhui and southern Jiangsu. The 4th detachment got northern and middle Anhui. Due to being in the back of the Japanese army, the New Fourth Army didn't eliminate very many Japanese troops at first. The majority of the time they were establishing base areas and enlisting new recruits. After the Japanese had occupied Wuhan the New Fourth Army took the opportunity to set up several guerrilla camps in the area.