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 immigration to Hawaii of about 10,700 Portuguese. Whereas contracts for the Chinese workers that preceded them generally stipulated single men only, the Portuguese were allowed to bring their families, an incentive that the plantation owners hoped would provide stability. Prior to independence in 1975, many Cape Verdeans emigrated to Hawaii from drought-stricken Portuguese Cape Verde, formerly an overseas province of Portugal. Because these people arrived using their Portuguese passports, they were registered as Portuguese immigrants by the Hawaiian (and later, the American) authorities. Portuguese immigration to the islands slowed after 1887, which was the same year that King Kalākaua was stripped of power,