 Complete the following phrase:  Mongolia and Soviets supported Xinjiang Uyghurs and Kazakhs movement in the 19301940s. By 1945, the Soviets refused to support them after its alliance with the Communist Party of China and Mongolia interrupted its relations with the separatists under pressure. Xinjiang Oirats militant groups operated together the Turkic peoples but the Oirats did not have the leading role due to their small population. 