He attempted to close all the Indian Ocean naval passages to the Atlantic, Red Sea, Persian Gulf, and to the Pacific, transforming it into a Portuguese mare clausum established over the opposition of the Ottoman Empire and its Muslim and Hindu allies. In the expansion of the Portuguese Empire, Albuquerque initiated a rivalry that would become known as the Ottoman–Portuguese war, which would endure for many years.Some would argue the navalvictories of Alphonso de Albuquerque were the first step toward European domination of the world.