Which of these military product innovations was specifically developed during World War I and fundamentally changed battlefield tactics and vehicle design?

Throughout military history, certain product innovations have revolutionized how wars are fought and won. These technological breakthroughs often began as specialized military equipment before finding their way into civilian use. From communications to transportation, medicine to food preservation, military necessity has driven countless innovations we now take for granted. Test your knowledge about a groundbreaking military product that transformed modern warfare.

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The M1 Garand semi-automatic rifle
The Caterpillar tracked vehicle system (tank treads)
Radar detection technology
Kevlar body armor