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 Mongolia's autonomy. According to an Associated Press dispatch, some Mongol chieftains signed a petition asking China to retake administration of Mongolia and end Outer Mongolia's autonomy. The Tusiyetu Khan Aimak's Prince Darchin Ch'in 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 People's 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 Mongolian Revolution of 1921 broke out and Ungern and the remaining Chinese troops were driven out in the following months, and on July 6, 1921, the Mongolian People's Party and Soviet troops took Niislel Khuree. The People's Party founded a new government, but kept the Bogd Khaan as nominal head of state. In the following years through some violent power struggles, Soviet influence got ever stronger, and after the Bogd Khaan's death, the Mongolian People's Republic was proclaimed on November 26, 1924. The government took control of the Bogda Khan's seal after his death according to the 26 November 1924 Constitution of the Mongolian People's Republic.