Battle of the Somme (July-November 1916)
1. Supposed to be a huge breakthrough winning the war on the very first day
2. British army lost 19,240 men killed and nearly 50,000 wounded on 1st July 1916
3. British had suffered around 420,000 men killed, wounded and captured by November
4. Germans had lost around 440,000
5. Extraordinary pressure on the medical services