In 2016 alone, bomb disposal experts collected 25 tons of ammunition in the Somme battlefields. They say it will probably take another 500 years to eliminate it all before the area is safe.
Poster Comment:
Google this "July 1, 1916 worst day in British military history" They had 58,000 casualties in one day. By comparison, the South and the North only had 53,000 casualties total from both sides during the three days of the battle of Gettysburg.