In the first half of 1918 the Germans launched five offensives in the west, and by July the German empire was at its greatest ever extent. With the US entry to the war, the allies know they could win if they could hold out long enough. They might win the war in 1919, or at worst in 1920.
In the event the Germans signed an armistice on 11 November 1918. Why did the war end so quickly? What was the balance between the western fronts and the other fronts? Did the war at sea play a part? And how important was the situation at home?