Which innovative supply chain system, developed during World War II, was nicknamed the 'Red Ball Express' and what was its primary purpose?

Throughout history, military success has often hinged on logistics and supply chain efficiency. From Alexander the Great to modern warfare, the ability to equip, feed, and transport troops has decided the outcome of countless conflicts. This trivia question explores a revolutionary supply chain innovation that transformed military capability during a pivotal historical period.

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A high-speed truck convoy system that transported over 400,000 tons of supplies to advancing Allied forces in Europe
An aerial supply drop network that used color-coded parachutes to deliver medical supplies to field hospitals
A specialized naval supply chain that used red-marked ships to deliver ammunition to Pacific theater operations
A railroad logistics system that used red-painted cars to prioritize critical military equipment shipments across the United States