By Emerson Brooking
On August 7, 1914, the French advanced into German-controlled Alscace, beating back the German divisions with a vicious display of massed firepower and artillery. This was the opening day of the Battle of the Frontiers, a month-long struggle of maneuver in which French, British, and German armies played tug-of-war across a 440-mile front. This was World War I before the trenches, where the visions of nineteenth-century military planners collided with the realities of twentieth-century industrial warfare. The battle saw 670,000 dead or wounded in a month—the highest density of losses in the entire war. This month would shatter a century of military doctrine.