The Kaiserschalcht (Kaiser's Battle) also know as the Ludendorff Offensive were a series of German attacks along the Western Front of WWI during the which led to the surrender of French and British forces in Europe. The German authorities had realised that their only remaining chance of victory was to defeat the Allies before the overwhelming human and resources of the United States could be deployed. They also had the advantage of nearly 50 freed by the Russian surrender (Treaty of Brest-Litovsk).