Final answer:
The Treaty of Brest-Litovsk, signed on March 3, 1918, ended the fighting between Germany and Russia in WWI, allowing Russia to withdraw from the war and focus on establishing the Soviet Union. This treaty was separate from the Treaty of Versailles, which formally ended WWI.
Step-by-step explanation:
The treaty that ended the fighting between Germany and Russia during World War I is known as the Treaty of Brest-Litovsk. Signed on March 3, 1918, this agreement came into effect well before the broader conclusion of the war with the Treaty of Versailles. The Treaty of Brest-Litovsk resulted in significant territorial concessions from Russia to Germany, including territories such as Poland, Ukraine, Finland, and the Baltic states (Lithuania, Latvia, and Estonia). Russia's acceptance of the treaty allowed it to exit the war and focus on internal affairs, specifically the consolidation of the new Communist state, the Soviet Union.
In contrast, the Treaty of Versailles ended World War I on a larger scale, imposing severe repercussions on Germany and reshaping the map of Europe. However, the Treaty of Versailles did not directly involve Russia as it had already exited the conflict due to the earlier Treaty of Brest-Litovsk.