Which innovative supply chain solution was crucial to the Allied victory in World War II and became known as the 'Red Ball Express'?

Throughout history, military success has often hinged not just on strategy and courage, but on the effectiveness of supply chains. From ancient armies to modern warfare, the ability to equip, feed, and transport military forces has determined the outcome of countless conflicts. This trivia question examines a famous historical supply chain innovation that changed the course of a major military campaign.

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A continuous truck convoy system that delivered over 12,500 tons of supplies daily to advancing Allied forces after D-Day
An underground railroad network used to smuggle weapons across occupied Europe
A fleet of specially designed cargo submarines that avoided German U-boat detection
A system of lightweight portable bridges designed to rapidly replace destroyed infrastructure