Ming China's Yongle Emperor sent maritime expeditions under Admiral Zheng He to establish imperial control over the maritime trade, to bring the maritime trade into the tributary system and to force foreign countries to comply with the tributary system. But the expeditions were stopped to divert their funds to the mounting conflicts with the Mongols. What if they weren't stopped and Ming conquered the Indian Ocean ? POD is that instead of looking down on trade Hongwu Emperor establishes a state monopoly on all external trade in ports and border cities. He opts for a professional standing army partly funded by this trade monopoly instead of Militia based Guard battalion system. An expeditionary fleet solely funded by this trade is established monopoly. This fleet divides and vassalizes the Majapahit Empire in East Indies by intervening Regreg War. Subsequently Sri Lanka, Gujarat, Oman, Yemen, Ethiopia and Zanzibar are also vassalized. This gives China control over most of Indian Ocean trade.