The Battle of Verdun - 1916

S1, E1: The town of Verdun, in Northeast France, was the scene of World War I's most emblematic battle. During the harsh winter, the German army prepared a powerful offensive on the Meuse Valley. After 300 days of fighting and 300,000 dead, the action shifted to the Somme. With so much firepower trained on the French, why did the German offensive fail? How did the battle color the course of the Great War?