The New Fourth Army (simplified Chinese: 新四军; traditional Chinese: 新四軍; pinyin: Xīn Sì Jūn) was a unit of the National Revolutionary Army of the Republic of China established in 1937. In contrast to most of the National Revolutionary Army, it was controlled by the Communist Party of China and not by the ruling Kuomintang. The New Fourth Army and the Eighth Route Army were the two main communist forces from 1938.