Which famous brand first developed its global recognition and customer loyalty by supplying American troops through military PX stores during World War II?

The Post Exchange (PX) system represents one of the most unique retail operations in history, serving military personnel worldwide. These stores have evolved from simple sutler wagons following Civil War troops to sophisticated retail networks that boost morale and provide familiar products to service members stationed far from home. This poll tests your knowledge about how these military retail institutions developed their customer loyalty strategies during critical wartime periods.

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Coca-Cola, whose president Robert Woodruff vowed in 1941 that 'every man in uniform gets a bottle of Coca-Cola for 5 cents wherever he is'
Hershey's, which created the specialized D ration chocolate bar exclusively for military consumption
Gillette, which secured exclusive contracts to supply razors and blades to all American servicemen
Zippo lighters, which became a cultural icon after being the official lighter supplier to the U.S. military