 Complete the following phrase:  However, the Republic of China was able to use the Russian Revolution and the ensuing civil war as a pretext to deploy troops in Outer Mongolia, and in 1919 the Mongolian government was forced to sign a treaty that abolished Mongolias autonomy. According to an Associated Press dispatch, some Mongol chieftains signed a petition asking China to retake administration of Mongolia and end Outer Mongolias autonomy. The Tusiyetu Khan Aimaks Prince Darchin Chin Wang was a supporter of Chinese rule while his younger brother Tsewang was a supporter of the Russian warlord Ungern-Sternberg. It was under Chinese occupation that the Mongolian Peoples Party was founded and once again looked to the north, this time to Soviet Russia, for help. In the meantime, White Russian troops led by Roman von Ungern-Sternberg had occupied Khuree in early March 1921, and a new theocratic government declared independence from China on March 13. But the 