Which iconic military recruitment advertising campaign was credited with adding over 2 million volunteers to the Allied forces during World War I?

Throughout military history, effective marketing and recruitment campaigns have played crucial roles in bolstering armed forces during critical periods. Some advertising campaigns have become legendary for their impact on military recruitment, national morale, and the course of conflicts. This trivia question focuses on one of the most iconic military recruitment campaigns that changed the trajectory of a major conflict. Test your knowledge of how marketing intersected with military necessity at a pivotal historical moment.

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Lord Kitchener's 'Your Country Needs You' poster campaign (1914)
The 'Rosie the Riveter' campaign (1942)
Uncle Sam's 'I Want You for U.S. Army' poster series (1917)
The British 'Dig for Victory' campaign (1939)