After a week of artillery bombardment, the British launched their attack and suffered 60,000 casualties in a single day.  
It saw the death of the famous British strategist Sir Basil Henry Hart.  After a week of artillery bombardment, the British launched their attack and suffered 60,000 casualties in a single day.  In a couple of months torrential rains turned the battlefield to a sea of mud and blood, though by November the Germans had retreated to the Hindenburg Line.  The Allied goal of relieving pressure on Verdun was achieved in this encounter that saw he introduction of the tank in battle.   FTP, identify this 1916 WWI battle named for the river along which it was fought.
It saw the death of the famous British strategist Sir Basil Henry Hart.  
First Battle of the Somme