马家军
In 1914, Ningxia was merged with the province of Gansu. However, in 1928 it was detached from Gansu and became a separate province. Between 1914 and 1928, the Ma clique ruled the provinces of Qinghai, Ningxia and Gansu; General Ma Hongkui was the military governor of Ningxia and had absolute authority in the province. The Muslim conflict in Gansu, which lasted from 1927 to 1930, spilled over into Ningxia. In 1934, warlord and National Revolutionary Army general Sun Dianying attempted to conquer the province, but was defeated by an alliance led by the Ma clique.