Indian Ocean trade Madagascar at this time leaving behind a lasting cultural and genetic legacy. Chinese fleets under Zheng He criscrossed the Indian Ocean during the early part of the 15th century. The missions were diplomatic rather than commercial, but many exchanges of gift and produces were made. The Portuguese under Vasco da Gama discovered a naval route to the Indian Ocean through the southern tip of Africa in 1497–98. Initially, the Portuguese were mainly active in Calicut, but the northern region of Gujarat was even more important for trade, and an essential intermediary in east-west trade. Venetian interests were directly threatened as
William Weston (explorer) working together by this time, with Weston probably being one of the 'great seamen' and Bristol 'companions' of the Venetian explorer, discussed in a diplomatic correspondence of December 1497.. In a letter to the Duke of Milan, the Milanese ambassador noted that some of Cabot's Bristol companions on his recent voyages had accompanied the Venetian to Court and had testified to the truth of the explorer's claims about the lands [North America] he had discovered in the summer of 1497. While the exact year of Weston's independent voyage has yet to be determined, Jones and Condon suggest that it took