The First Battle of the Marne commenced as the German forces, having advanced deep into France, posed a significant threat to the capital, Paris. The German strategy hinged on the von Schlieffen Plan, which aimed to secure a swift victory by encircling Paris and defeating France before turning attention to the Eastern Front against Russia. As German troops neared the city in early September, the French and British forces prepared to respond to this encroachment. The French high command ordered a counteroffensive, positioning their troops to strike back with the intention of overwhelming the Germans. The battle began on September 5 and lasted until September 12, 1914. The Allies executed a series of tactical maneuvers that successfully outflanked the Germans, leading to fierce fighting on multiple fronts. Notable commanders included French General Joseph Joffre and British General Sir John French, who coordinated their forces to launch a decisive push against the German lines. This battle was characterized by its fierce combat and effective use of communication between allied units.