Who was the leader of the fleet of ships sent out by emperor Yong Le?

The leader of the fleet of ships sent out by Emperor Yongle of the Ming Dynasty was Admiral Zheng He. He commanded several voyages between 1405 and 1433, exploring parts of Southeast Asia, South Asia, the Middle East, and East Africa. Zheng He's expeditions aimed to promote trade, collect tribute, and assert Chinese dominance in the region. His voyages significantly expanded maritime knowledge and established China's presence in the Indian ocean.