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
Portuguese discovery of the sea route to India Constantinople by the Ottomans, the trade of Venice and Genoa reduced to a great degree. The advantage of the Portuguese to establish a sea route therefore virtually free of assault – however, covered in perils in the sea – showed itself rewarding and outlined a large income to the Crown in the future. Portugal directly linked the spice producing regions to their markets in Europe. Around the year 1481, João Afonso of Aveiro attempted to undertake an exploration of the kingdom of Benin, and gathered information about an almost legendary prince Ogané, whose kingdom was located far to the east