Complex sentence: Consequently, Mongolia sought Soviet Russian support to reclaim its independence, and in 1921, Chinese and White Russian forces were driven out by the Red Army of the Soviet Union and pro-Soviet Mongolian forces.
Split into simpler sentences: Consequently, Mongolia sought Soviet Russian support to reclaim its independence. In 1921, Chinese and White Russian forces were driven out by the Red Army of the Soviet Union and pro-Soviet Mongolian forces.