How did Russias alliance with the US hell the allies at the end of world war 1?

Russia's alliance with the U.S. during World War I played a crucial role in bolstering the Allies' efforts against the Central Powers. The entry of the United States into the war in 1917 provided fresh troops, resources, and morale, helping to offset the exhaustion faced by the Allies after years of fighting. Although Russia exited the war early due to the Bolshevik Revolution, the combined strength of the U.S. and remaining Allied forces ultimately contributed to the defeat of Germany and its allies in 1918. This alliance helped shift the balance of power, ensuring a more favorable outcome for the Allies.