Schlieffen Plan

The Schlieffen Plan was the German General Staff's early 20th century overall strategic plan for victory in a possible future war in which the German Empire might find itself fighting on two fronts: France to the west and Russia to the east. The First World War later became such a war, with both a Western and an Eastern Front.

The plan took advantage of expected differences in the three countries' speed in preparing for war. In short, it was the German plan to avoid a two-front war by concentrating troops in the West and quickly defeating the French and then, if necessary, rushing those troops by rail to the East to face the Russians before they had time to mobilize fully. The Schlieffen Plan was created by Count Alfred von Schlieffen and modified by Helmuth von Moltke the Younger after Schlieffen's retirement; it was Moltke who actually implemented the plan at the outset of World War I. In modified form, it was executed to near victory in the first month of the war. However, the modifications to the original plan, a French counterattack on the outskirts of Paris (the Battle of the Marne) and surprisingly speedy Russian offensives ended the German offensive and resulted in years of trench warfare. The plan has been the subject of intense debate among historians and military scholars ever since. Schlieffen's last words were "remember to keep the right flank strong," which was significant in that Moltke strengthened the left flank in his modification.