WWI German fighter planes in formation

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WWI German biplanes in flight

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Rumpler-Taube aircraft blueprint

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Two vintage fighter planes in flight

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World War I propaganda poster collage

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World War I tank on display

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Zeichnet War Bonds poster

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World War I tanks in field

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Recruits on the USS Recruit

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German soldiers in studio portrait

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USS Michigan battleship at sea

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Tank on a hillside

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USS New York battleship at sea

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Early British tank model

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Anatomy of a British Mark V tank

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WWI biplanes in formation

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Red biplane fighter aircraft

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WWI biplane on airfield

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Red biplane in flight

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French tanks in World War I

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