Series I - World War I, 1917-1930

Poster of U.S. Army Air Service servicemen with an aircraft in the background, circa 1917. Art by J. Paul Verrees. Text: "Join the Air Service and serve in France / Do it now."

Poster of servicemen firing a machine gun loaded with war savings stamps as ammunition, circa 1917-1918. Art by Casper Emerson Jr., issued by the U.S. Treasury Department. Text: "Help them / Keep your War Savings pledge."

Poster of two U.S. Army Air Service servicemen with aircraft, a balloon, and an airship, circa 1918-1919. Art by Warren Keith, produced by the Edwards & Deutsch Litho. Company. Text: "Join the Air Service / 'Give 'er the gun / Learn. Earn."

Poster of a U.S. Army aircraft crashed in water, circa 1917-1918. Text: "Warning! Consider the possible consequences if you are careless in your work."

Poster of U.S. Navy aircraft taking off from an aircraft carrier, circa 1927-1930. Art by J. W. Burbank.

Poster of a woman in an American flag-themed dress scattering seeds in a field, circa 1918. Art by Jamie Montgomery Flagg, produced by the National War Garden Commission. Text: "Will you have a part in victory? Write to the National War Garden…