Which groundbreaking marketing strategy did the Imperial War Museum in London implement in 2014 that resulted in a 70% increase in younger visitors?

Military museums face unique challenges in marketing historical artifacts and stories while respecting their solemnity. This trivia question explores an innovative marketing strategy used by a famous military museum that dramatically increased visitor engagement and attendance. Test your knowledge of how cultural institutions dedicated to military history have evolved their outreach methods in the digital age.

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The 'Real-Time History' social media campaign that live-tweeted WWI events as if happening in real-time, 100 years to the day after they occurred
The 'Tactical Retail' approach that positioned gift shop merchandise throughout exhibition spaces rather than only at museum exits
The 'Veterans as Brand Ambassadors' program that hired former military personnel as the primary tour guides and social media personalities
The 'Battlefield Marketplace' concept that recreated wartime markets where visitors could purchase replica rations and period-appropriate goods