On this Day 21 February 1916: The Battle of Verdun commenced
The battle was fought from 21 February to 18 December 1916, and was the largest and longest battle of the First World War on the Western Front between the German and French armies
Lasing for 303 days, it was the longest and one of the most costly in human history. In 2000, Hannes Heer and K. Naumann calculated 377,231 French and 337,000 German casualties, a total of 714,231, an average of 70,000 a month.
5. Verdun Dug Out
November 1916: Soldiers in a trench outside a dugout at Verdun. (Photo by Topical Press Agency/Getty Images)