In this essay I will explain step by step what the Schlieffen Plan was and why it didn't work. It began when Germany declared war on Russia and France. However, their allies Britain and Belgium stepped in to help while Austria-Hungary was in an alliance with Germany. The Schlieffen Plan was created by Alfred Von Schlieffen, but he died before the start of World War I. The plan was intended to be foolproof. First, Germany planned to quickly defeat France by crossing into Belgium before Russia could get involved. The aim was to avoid a war on two fronts. Germany thought it would take Russia six weeks to mobilize its troops. Germany would hold the French on the border with its weak forces and then curb the Russian advance in the East with a small German army. Unfortunately, the Schlieffen Plan had failed, I will explain why this plan failed as follows. First, I will write about how Belgium resisted Germany. The first plan to defeat Belgium on August 4, 1914 failed as Belgian forces were unexpectedly able to halt the German advance in a short time. It only took them 3 days to delay the invasion. At this point, Germany had miscalculated the strength of the Belgian forces. Even though Germany used its "Big Bertha" artillery to destroy the Belgian forts at Liege, Namur and Antwerp, Belgium still managed to fight back, which created a continuing threat to German supply lines to the north . The Belgians had sabotaged with lightning speed what the success of the Schlieffen Plan was based on. I will then talk about how the British army proved more effective than Germany hoped. Germany believed that Britain would not intervene to help Belgium... amidst paper fronts, as expected. In my opinion, I believe that the changes made by the German generals were the worst tactic that contributed to the ultimate failure of the Schlieffen Plan. If the German generals had continued with their original plan, the French army would not have been able to retreat to Paris, so the entire German forces could have fought against the Russian front rather than having to send part of its troops to fight. against the Russian front rather than having to send some of their troops to fight also against the British, Belgians and French, thus weakening their own ability to achieve victory. Citation - Neiberg, Michael S. "World War I". Student of the world of books. World Book, 2014. Web. May 26, 2014.- Why did the Schlieffen plan fail? » BBC News. BBC, nd Web. May 26, 2014.- Trueman, Chris. “The Schlieffen Plan”. The Schlieffen Plan. Np, nd Web. May 25 2014.