 Complete the following phrase:  In 1553, Leonel de Sousa obtained authorization for the Portuguese to establish themselves in Canton and Macau. Macau was later offered to John III as a reward for Portuguese assistance against maritime piracy in the period between 1557 and 1564. Malacca, which controlled the eponymous Strait of Malacca, was vital to Portuguese interests in the Far East. After an unsuccessful expedition in 1509, Malacca was finally 