Answer:
The Soviet Union signed an armistice with Germany and withdrew Russian forces from the war.
Step-by-step explanation:
Following the October Revolution, the Bolsheviks under the leadership of Vladimir Lenin ousted the Provisional Government in November 1917 and seized power in the Russian Empire. The Treaty of Brest-Litovsk, which they signed with Germany shortly after, led to an armistice with Germany and its allies in March 1918, essentially ending Russia's participation in World War I. Significant lands were given up by Russia to Germany and its allies as part of the treaty. This action was taken in order to concentrate on strengthening authority and addressing internal problems rather than continuing to take part in the conflict.