The First Battle of the Marne took place from September 6 to September 12, 1914, during World War I. It was a significant conflict between the Allied Powers, primarily France and Britain, and the German Empire. The battle marked a turning point in the war, as the Allies successfully halted the German advance towards Paris. The battle involved intense fighting along the Marne River, with both sides suffering heavy casualties. The Allies managed to push the Germans back, leading to a stalemate and the establishment of trench warfare on the Western Front. This battle set the stage for years of conflict in Europe.