WWI has the dubious distinction of being the first modern war to be fought with the mass of industrial mechanization and production in close support.  To a lesser extent, this distinction is also often shared with the American Civil War.  The mental distress of the soldiers involved in this global war are well known to most schoolchildren enrolled in Social Studies or History classes.  The psychiatric distresses imparted upon these men during the massive artillery bombardments of 1914-1918 are best exemplified in the following video made available by the British War Archives.

Select section 3 in the left hand drop down menu.  Or watch the whole series!