World War I: The First Battle Of The Marne, 100 Years Later

MEAUX, FRANCE - AUGUST 25: Visitors walk among exhibits of German and French weaponry from World War I at the Museum of the Great War at Meaux (Musee de la Grande Guerre du Pays de Meaux) on August 25, 2014 in Meaux, France. At the beginning of September, 1914, German armies had nearly reached Paris when British and French armies, after weeks of retreat, counterattacked and stemmed the German advance in the First Battle of the Marne, pushing the Germans north to what would soon become the stalemate trench war that defined the Western Front for the next four years. (Photo by Sean Gallup/Getty Images)