Answer:
Fighting the war on multiple fronts proved to be too much for German forces due to a combination of factors. First, Germany's military resources and capabilities were already stretched thin by the time they began fighting on multiple fronts. They had already been fighting the war on the Eastern Front against the Soviet Union, and the addition of the Western Front against the Allies put an immense strain on their military resources. Second, the geographical distance between the two fronts made it difficult for Germany to effectively coordinate its military strategy and resources. This led to a fragmented approach to the war effort, which made it easier for the Allies to exploit weaknesses in the German military. Finally, the entry of the United States into the war in 1917 added another major power to the Allies and tipped the balance of the war against Germany. The combination of these factors ultimately made it too difficult for German forces to successfully fight on multiple fronts, leading to their defeat in World War I.