Which WWII advertising campaign was revolutionary for using market research to target specific demographics, leading to over 1 million women joining the workforce in military-supporting roles?

Throughout military history, governments and armed forces have employed sophisticated advertising campaigns to boost recruitment, maintain morale, and shape public opinion. From Uncle Sam's iconic pointing finger to digital age recruitment strategies, these campaigns reflect both military needs and the cultural contexts of their times. This trivia question explores how one of history's most successful military recruitment campaigns transformed public sentiment during a critical period.

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"We Can Do It!" (Rosie the Riveter) campaign
"Loose Lips Sink Ships" security awareness campaign
"Buy War Bonds" Treasury Department campaign
"Uncle Sam Wants You" recruitment posters