crossed the border and attacked rebel positions in the Ili area in the Soviet Invasion of Xinjiang. Zhang Peiyuan's forces were defeated and he committed suicide. Despite valiant resistance, Ma Zhongying's troops were forced to retreat from the Soviet military machine's aerial bombing and were pushed back from Urumchi during the Battle of Tutung. Soviet assistance resulted in a rare White Russian and Soviet temporary military alliance against Ma. Ma wiped out a Soviet armored car column at the Battle of Dawan Cheng. Ma's retreating forces began advancing down to southern Xinjiang to destroy the First East Turkestan Republic. He sent out an advance guard under Ma Fuyuan to attack the Khotanlik Uyghurs and Kirghiz at Kashgar. At this point Chiang Kai-shek was ready to send Huang Shaohong and his expeditionary force of 15,000 troops to assist Ma Zhongying against Sheng, but when Chiang heard about the Soviet invasion he decided to withdraw to avoid an international incident if his troops directly engaged the Soviets. Georg Vasel, a German, was told by his White Russian driver when meeting Ma Zhongying, "Must I tell him that I am a Russian? You know how the Tungans hate the Russians." Destruction of the First East Turkestan Republic The Khotanlik Uyghurs and Kirghiz had conspired to form an independent regime. On February 20, 1933, the Committee for National Revolution set up a provisional Khotan government with Sabit as prime minister and Muhammad Amin Bughra as head of the armed forces. It favored the establishment of an Islamic theocracy. Afghan King Mohammad Zahir Shah provided weapons and support to the East Turkestan Republic. Sheng Shicai and the Soviet Union accused Ma Zhongying, a Muslim and ardently anti-Soviet, of being used by the Japanese to set up a puppet regime in Xinjiang, as they had done with Manchukuo. Sheng claimed that he captured two Japanese officers on Ma's staff. However, not a single claim of Sheng's could be proven, and he did not provide any evidence for his allegations that Ma was colluding with the Japanese. Ma Zhongying publicly declared his allegiance to the Kuomintang at Nanjing. Ma himself was given permission by the Kuomintang to invade Xinjiang. Western traveler Peter Fleming speculated that the Soviet Union was not in Xinjiang to keep out the Japanese but to create their own sphere of influence. The Chinese Muslim forces retreating from the north linked up with Ma