Technology impacted the weapons troops carried, too. Rifles were outfitted with accurate sniper scopes, so the enemy could be picked off from a safe distance. Still, the hardware that attached blades and bayonets to the ends of these rifles was also present—some were even designed to be clamped to revolvers for combat at close range.

On the homefront, citizens were exhorted to support the doughboys “over there” with wartime propaganda posters that encouraged thrift, contributions to the war effort, and enlistment. The most famous of these was a 1917 poster titled “I Want You for the U.S. Army” by James Montgomery Flagg, which featured a stern-faced, top-hatted Uncle Sam, pointing an accusatory finger at the viewer. In fact, Flagg made 46 different images to support the war effort, including one of a sleeping Lady Liberty that shouted “Wake Up, America!” across its brow. In fact, Flagg's Uncle Sam poster was so popular, it was also widely used in World War II.

Other famous American artists of the day included Howard Chandler Christy, whose “I Want You for the Navy” from 1917 featured a flirty blonde in a man's Navy uniform. A year later, Christy put a fetching brunette in a floppy, white sailor’s cap proclaiming, “Gee!! I Wish I Were a Man. I’d Join the Navy, Naval Reserve or Coast Guard.” Joseph Christian Leyendecker’s images were more sober and classically heroic—a sailor shaking hands with a somber Lady Liberty; a group of bare-chested, barefoot men loading ordnance into an artillery gun; a Boy Scout holding an enormous sword bearing the words “Be prepared.”

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