Xu Shuzheng
Mongolia and Tuva became contested territories. After being occupied by the Chinese General Xu Shuzheng in 1919, they came under the sway of the Russian White Guard General turned independent warlord, Ungern von Sternberg in 1920. Soviet troops, with support from Mongolian guerrillas led by Damdin Sükhbaatar, defeated the White warlord and established a new pro-Soviet Mongolian client state, which by 1924 became the Mongolian People's Republic.