Join the Air Service--Learn-Earn / W.Z. ; Forbes, Boston

 

A 1917 recruitment poster urges young Americans to “Join the Air Service—Learn-Earn,” reflecting the rapid expansion of military aviation during World War I. Centered on the bold star insignia of the U.S. Army Air Service, the design features airplanes and dirigibles that represent the emerging importance of air power in modern warfare. In the foreground, ground crew members prepare an aircraft, emphasizing the technical skills and labor required behind the scenes.