P.E. Nobbs’ poster “Your Chums Are Fighting; Why Aren’t You?,” created during World War I, is a striking example of wartime propaganda aimed at encouraging enlistment. The poster features a powerful and direct appeal to the viewer’s sense of camaraderie and duty, using emotional tactics to spur action. In the foreground, three British soldiers are depicted in the midst of battle, their expressions resolute and determined as they charge forward, rifles in hand. The central question, “Why Aren’t You?” confronts the viewer in bold, capitalized text, making the appeal personal and urgent. The message is clear: if your friends are risking their lives for their country, you should be too. Nobbs’ use of bold colors, particularly the bright uniforms of the soldiers and the contrasting dark, smoky background, heightens the sense of drama and immediacy. The poster taps into feelings of peer pressure and patriotism, urging men to join their “chums” on the front lines. By emphasizing the personal connections between those already serving and the potential recruit, Nobbs makes the act of enlistment seem both a moral obligation and a shared, heroic endeavor. The poster remains an iconic example of how art was used to influence public sentiment during the war.