The World War I Battle of the Somme began on 1 July and ended on 18 November 1916. It's estimated that as many as 1.12 million men were killed during that five month long battle. When the Somme's casualty list is coupled with the numbers killed in the simultaneous Battle of Verdun, it's estimated that an average of more than 6,600 men were killed every day at a rate of some 277 every minute ... meaning that nearly every second, five men died.
This video represents what portions of the battlefield look like today and the film's creator has superimposed WWI reels to show viewers what it looked like 100 years ago ... it's well worth the time: