 Complete the following phrase:  The Bogd Gegen lost his power when Chinese troops occupied the country in 1919. The Tusiyetu Khan Aimaks Prince Darchin Chin Wang was a supporter of Chinese rule while his younger brother Tsewang was a supporter of Ungern-Sternberg. When Baron Ungerns forces failed to seize Urga in late 1920, the Bogd was placed under house arrest; then he was freed and reinstated by Ungern shortly before he took Urga in 1921. After the 