Which iconic military recruitment advertising slogan, first introduced during World War I, was revived in 1917 and ultimately became one of the most successful recruitment tools in military advertising history?

Throughout military history, governments have employed sophisticated advertising techniques to boost recruitment during times of conflict. From posters to television commercials, these campaigns have evolved dramatically over time, reflecting both technological advancements and changing social attitudes toward military service. This trivia question focuses on one of the most iconic military recruitment advertising campaigns in history and its impact on enlistment numbers.

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"I Want YOU for U.S. Army" (featuring Uncle Sam pointing)
"Be All You Can Be" (U.S. Army campaign from the 1980s)
"The Few. The Proud. The Marines." (USMC slogan)
"For King and Country" (British WWI recruitment slogan)