The Shanxi clique, also known as the Jin clique (Jin being the abbreviated name of Shanxi; Chinese: 晉系; pinyin: Jìn Xì), was one of several military factions that split off from the Beiyang Army during China's warlord era.
Yuan Shikai, after assuming presidency, installed Yan Xishan as the governor of Shanxi.
He kept his province neutral from the various civil wars the nation was facing, although he would fight troops from other cliques if they encroached upon the provincial boundaries.
In 1927, faced with the overwhelming forces of the National Revolutionary Army, the Fengtian clique issued an ultimatum to Yan to join their side.
As a reward, the Kuomintang allowed the Shanxi clique to expand all the way to the sea at Hebei and Shandong.