In 1405, the horizon off the Chinese coast disappeared behind a wall of wood and canvas: 317 ships carrying 28,000 men, a floating city of soldiers, doctors, linguists, and astronomers, setting sail nearly a century before Columbus crossed the Atlantic. The man who commanded it, Zheng He, defied every expectation of a royal admiral. Born Ma He to a Muslim family in Yunnan, captured and castrated as a boy by the very army he would one day lead, he rose through loyalty and tactical brilliance to become the most trusted commander of the Yongle Emperor and arguably the greatest admiral in Chinese history.

This episode follows his seven voyages across the Indian Ocean, where lavish gifts and a giraffe presented as a mythical qilin masked a fleet that hunted pirate kings and waged war in Sri Lanka to enforce China's tributary system. It also takes apart the legend of the 127-meter treasure ships, tracing the myth to a 1597 romance novel and a mistranslated unit of measurement, and asks the harder question: why an empire that ruled the seas burned its own blueprints, dismantled its shipyards, and turned inward, erasing its greatest explorer from the record.

• How a captured, enslaved boy from Yunnan became the Yongle Emperor's most trusted military commander
• Why the Ming court trusted eunuchs over scholar-bureaucrats, and how that paranoia built the treasure fleet
• The giraffe that became a qilin: 15th-century propaganda that legitimized a usurper's throne
• Debunking the 127-meter treasure ship: hogging, sagging, shipyard archaeology, and a mistranslated zhang
• Why China burned its own fleet's records, and what history lost when the bureaucrats won