Most of the 9.7 million soldiers who perished in WWI were killed by the conflict's unprecedented firepower. Many survivors experienced acute trauma. Hulton Archive / Getty Images In September 1914, at ...

Shrapnel from mortars, grenades and, above all, artillery projectile bombs, or shells, would account for an estimated 60 percent of the 9.7 million military fatalities of World War I. And, eerily ...