After the Russian Revolution and Lenin taking power, Russia withdrew from World War 1 through the Treaty of Brest-Litovsk in March 1918. This allowed Germany to focus on the Western Front, but they were weakened and pushed back by July 1918 with help from fresh American troops. Germany's allies then began to surrender, and revolutions in Germany and Austria-Hungary ended their war efforts. An armistice on November 11, 1918 ended the fighting, but peace negotiations at Versailles lasted until 1919 and were contentious, with Clemenceau wanting harsh terms for Germany and Wilson wanting a lasting peace. The resulting Treaty punished Germany severely and redrew borders in Europe.