Combat was hard and bloody. Soldiers drowned in the mud. During the infamous Battle of Passchendaele, the third major conflict at Ypres, more than 500,000 soldiers were killed. An enormous cost ...

Around 40% of the casualties at the Battle of the Somme had shell shock. By the summer of 1917, with Passchendaele raging, the official rates were much lower and fewer soldiers were being brought ...