Which supply chain innovation most dramatically improved Allied logistics during World War II, allowing for unprecedented military material production and distribution?

Throughout history, military success has often depended on supply chain innovations as much as battlefield tactics. From Napoleon's famous observation that 'an army marches on its stomach' to modern just-in-time logistics systems for advanced weaponry, the evolution of military procurement reflects fascinating developments in supply chain management. This trivia question focuses on a pivotal supply chain innovation that transformed military operations during a critical historical conflict.

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The standardized shipping container system
The Liberty Ship mass production program
The integrated just-in-time inventory management system
The centralized digital procurement network