produced a staggering amount of morbid injuries that weren't treated properly. Returning soldiers and Marines were swept under the rug. Trench Warfare took an untold toll on the minds and bodies of our troops that, to this day, has never properly been
CHEMICAL WARFARE TWENTIETH CENTURY (Q The First World War: The French Tissot mask demonstrated by a French soldier. The Tissot mask was revolutionary in that it gave the wearer greater visibilty by allowing air to pass over the eye-pieces, Arras.