World War II Patriotic cover
"Keep 'Em Flying!
Control of the air was recognised early in World War II as a decisive factor in modern warfare. Hence the popularity of this slogan, "Keep 'em Flying!"
Sent by a serviceman under Free Franking from the U.S. Army Music School at Fort Myer, Virginia. It was postmarked Arlington, Virginia, December 10, 1942, Fort Myer Station.
One sheet of letterhead (2002.2035.63.2) is associated with this cover. The cachet is a product of The Advertisers Press (Capitol Stamp Co.) of Des Moines, Iowa.