The Tibetan Army was established in 1913 by the 13th Dalai Lama, who had fled Tibet during the 1904 British invasion of Tibet and returned only after the fall of the Qing power in Tibet in 1911. During the revolutionary turmoil, the Dalai Lama had attempted to raise a volunteer army to expel all the ethnic Chinese from Lhasa, but failed, in large part because of the opposition of pro-Chinese monks, especially from the Drepung Monastery. The Dalai Lama proceeded to raise a professional army, led by his trusted advisor Tsarong, to counter "the internal threats to his government as well as the external ones".