Which famous military recruitment campaign featured a stern-faced man pointing directly at the viewer and became one of the most influential advertising images in history?

Throughout history, military forces have used sophisticated advertising campaigns to attract recruits. From iconic posters to digital marketing strategies, military recruitment has evolved dramatically while maintaining certain psychological appeals. This trivia question explores a famous military recruitment campaign that significantly impacted enlistment numbers and became embedded in popular culture.

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Uncle Sam's "I Want YOU for U.S. Army" (United States, WWI)
Lord Kitchener's "Your Country Needs YOU" (United Kingdom, WWI)
"Be All You Can Be" campaign (United States, 1980s)
"For King and Country" campaign (British Commonwealth, WWII)