The aim of the Schlieffen Plan was to ensure German victory in the case of a two-front war against France and Russia. It called on German forces to conquer France swiftly in the west and then pivot to take on the slower-moving Russian army in the east.
The Schlieffen Plan specified that German forces should attack France through Belgium, which was officially a neutral country. When the cogs of war began turning after the assassination of Archduke Franz Ferdinand on June 28, 1941, the Germans began to implement the Schlieffen Plan. However, Helmuth von Moltke, chief of the German General Staff at the beginning of World War I, modified the plan, weakening the forces in the west because of fears that the Russian Army could mobilize more quickly than previously thought. According to About.com, the weakened force could not deliver a knockout blow to the French Army, resulting in a deadly stalemate.