Which military branch first used the famous recruitment tagline 'Be All You Can Be' that dramatically increased enlistment rates during its campaign?

Throughout history, military branches worldwide have relied on powerful taglines and slogans to drive recruitment efforts and build their brand identity. These phrases have become ingrained in popular culture, sometimes remaining relevant for decades. This poll tests your knowledge of famous military recruitment taglines that have shaped how various armed forces present themselves to potential recruits and the public. Can you identify which branch or organization first used these iconic phrases?

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U.S. Army (1980-2001)
U.S. Marine Corps (1975-1998)
British Royal Navy (1982-1997)
U.S. Air Force (1984-2005)