troops governed locally while Han Chinese Bannermen, Mongol Bannermen, and Manchu Bannermen were brought only into emergency situations where there was sustained military resistance. Since it was not possible for only Manchus to conquer southern China, Ming Han Chinese armies conquered the territory for them. Three Liaodong Han Bannermen officers who played a great role in the conquest of southern China were Shang Kexi, Geng Zhongming, and Kong Youde, who then governed southern China autonomously as viceroys for the Qing. Wu, Geng, and Shang's son, Shang Zhixin, in the early 1660s began to feel threatened by the increasing control from the north, and decided they had no choice but to revolt. The ensuing Revolt of the Three Feudatories lasted for eight years. At the peak of the rebels' fortunes, they extended their control as far north as the Yangtze River, nearly establishing a divided China. Wu then hesitated to go further north, not being able to coordinate strategy with his allies, and the Kangxi Emperor was able to unify his forces for a counterattack led by a new generation of Manchu generals. By 1681, the Qing government had established control over a ravaged southern China from which it took several decades to recover. Manchu Generals and Bannermen were initially put to shame by the better performance of the Han Chinese Green Standard Army, who fought better than them against the rebels and this was noted by the Kangxi Emperor, leading him to task Generals Sun Sike, Wang Jinbao, and Zhao Liangdong to lead Green Standard Soldiers to crush the rebels. The Qing thought that Han Chinese were superior at battling other Han people and so used the Green Standard Army as the dominant and majority army in crushing the rebels instead of Bannermen. In 1652–1689, during the Sino-Russian border conflicts, the Qing dynasty engaged and pushed back about 2,000 Russian Cossacks in a series of intermittent skirmishes. The frontier in the south-west was extended slowly, in 1701 the Qing defeated Tibetans at the Battle of Dartsedo. The Dzungar Khanate conquered the Uyghurs in the Dzungar conquest of Altishahr and seized control of Tibet. Han Chinese Green Standard Army soldiers and Manchu bannermen were commanded by the Han Chinese General Yue Zhongqi in the Chinese expedition to Tibet (1720) which expelled the Dzungars from Tibet and placed it under Qing rule. At multiple places such as Lhasa, Batang, Dartsendo, Lhari, Chamdo,