What happened after America and Russia joined the Allies?

After America and Russia joined the Allies during World War I, the dynamics of the conflict shifted significantly. The influx of American troops and resources bolstered the Allied forces, helping to turn the tide against the Central Powers. Meanwhile, Russia's involvement initially contributed to the Eastern Front battles, but the Russian Revolution in 1917 led to their withdrawal from the war, allowing Germany to concentrate more forces on the Western Front. Ultimately, the combined efforts of the Allies, especially with the support of the U.S., were crucial in leading to the defeat of the Central Powers in 1918.