AdvertisementEven In 'The War To End All Wars,' There Was Art Coming From The TrenchesAugust 01, 2017Susan StambergfacebookEmailHarvey Dunn's 1918 oil painting The Sentry shows a soldier coming up from the trenches. "You see in his eyes what would later become known as the thousand-yard stare," says exhibit curator Peter Jakab. (National Museum of American History, Smithsonian Institution)