唐努乌梁海
At the end of 1911, the Mongols took action with an armed revolt against Manchu authorities but were unsuccessful. The independence movement that took place was not limited to just North (outer) Mongolia but was also a pan-Mongolian phenomenon. On 29 December 1911, Bogd Khan became the leader of the Mongol empire. Inner Mongolia became a contested terrain between Khan and the Republic. In general, Russia supported the Independence of Outer Mongolia (including Tannu Uriankhai) during the time of the 1911 Revolution.