Which ancient civilization created the 'Royal Road' system, an early supply chain innovation that allowed goods to travel 1,600 miles across their empire in just 7 days via relay stations?

Before modern logistics systems, ancient civilizations developed sophisticated methods to source and distribute goods across vast empires. From the Roman grain distribution network to Phoenician maritime trade routes, these early supply chain innovations laid the groundwork for today's global commerce. This trivia question challenges your knowledge about how ancient societies managed the complex flow of goods that sustained their economies and populations.

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Persian Empire under Darius I
Egyptian Empire under Ramses II
Roman Empire under Augustus
Mauryan Empire under Ashoka