--Despite the images of waves of soldiers being scythed down by machine gun fire, artillery and mortar shells inflicted the majority (60 percent) of wounds in the British infantry in World War I. Bullets caused 35 percent. (I didn't see numbers on gas casualties.)
--In 1938, some twenty years after the end of World War I, there were still 120,000 former British soldiers receiving pensions or awards for "shellshock" or other psychiatric disabilities -- that is, what he now call severe PTSD.
--Finally, I read aloud to my wife this passage by a Royal Fusiliers officer about dealing with a panicky soldier as they sheltered in a shell hole during a German artillery barrage during the battle of Passchendaele:
I tried to reason with the boy, but the more I talked top him the more distraught he became, until he was almost screaming. 'I can't stay here! Let me go! I want my Mum!' So I switched my tactics, called him a coward, threatened him with court martial and slapped his face as hard as I could, several times. It had an extraordinary effect. There was absolute silence in the shell-hole and then the corporal, who was a much older man, said, ‘I think I can manage him now, sir.' Well, he took that boy in his arms, just as if he was a small child, and when I crawled back a little later to see if all was well, they were both lying there asleep and the corporal still had his arms round the boy . . . .
Thomas E. Ricks covered the U.S. military for the Washington Post from 2000 through 2008.