The Mongolian Revolution of 1911 (Outer Mongolian Revolution of 1911) occurred when the region of Outer Mongolia declared its independence from the Manchu-led Qing China during the Xinhai Revolution. A combination of factors including economic hardship and failure to resist Western imperialism led many in China to be unhappy with the Qing government. When a new program to settle Mongolia with ethnic Han and assimilate the natives was unveiled, it was met with resistance that resulted in a relatively bloodless separation from the Qing Empire. Many Barga and Inner Mongolian chieftains assisted in the revolution and became the revolution leaders.