How did Russian revolution affect Russia in World War 1?

The Russian Revolution of 1917 significantly impacted Russia's role in World War I by leading to the abdication of Tsar Nicholas II and the establishment of a Bolshevik government. This new regime, opposing the war, signed the Treaty of Brest-Litovsk in March 1918, which ended Russia's involvement in the conflict but ceded vast territories to Germany. The revolution also caused internal turmoil, weakening the Russian military and contributing to the eventual collapse of the Eastern Front. Ultimately, the revolution shifted Russia from a monarchy to a communist state, profoundly altering its political landscape.