what event caused tension between russia and the allies during wwi? russia dropped out of the war. russia…

what event caused tension between russia and the allies during wwi? russia dropped out of the war. russia was defeated by germany. russia defected to the central powers.
Answer
Brief Explanations:
After the Russian Revolution, Russia signed the Treaty of Brest - Litovsk in 1918 and dropped out of World War I. This left the Allies in a more difficult military situation and caused tension as the Allies had expected Russia to continue fighting on their side. Russia was not defeated by Germany in the traditional sense of being overrun entirely, and it did not defect to the Central Powers.
Answer:
Russia dropped out of the war.