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
History of the Jews in Portugal of Spanish Jews subsequently fled to Portugal, where King John II granted them asylum in return for payment. However, the asylum was only temporary—after eight months, the Portuguese government decreed the enslavement of all Jews who had not yet left the country. In 1493, King John deported several hundred Jewish children to the newly discovered colony of São Tomé, where many of them perished. Following John's death in 1494, the new king Manuel I of Portugal restored the freedom of the Jews. However, in 1497, under the pressure of the Spain through the marriage of Isabella, Princess of Asturias, the