Which famous marketing campaign first utilized the term 'Military-Grade' as a product quality descriptor that later became widely used in civilian marketing?

Throughout history, military equipment manufacturers have employed various marketing strategies to promote their products to governments and armed forces. Some campaigns became legendary in military procurement circles, changing how military hardware was presented and sold. Test your knowledge about these famous military product marketing campaigns that influenced defense acquisition.

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Colt's 1911 'Battlefield Proven' campaign of 1912
Boeing's B-17 'Flying Fortress' promotional materials from 1935
DuPont's Kevlar body armor promotional materials from 1975
Lockheed Martin's F-22 Raptor 'Unmatched Performance' campaign of 1997