The Battle of Diu sometimes referred as the Second Battle of Chaul was a naval battle fought on February 3, 1509 in the Indian Sea, near the port of Diu, India, between the Portuguese Empire and a joint fleet of the Mamluk Burji Sultanate of Egypt, the Ottoman Empire, the Zamorin of Calicut and the Sultan of Gujarat, with technical naval support from the Republic of Venice and the Republic of Ragusa (Dubrovnik). The Portuguese victory was critical for its strategy of control of the Indian Sea, setting its trade dominance for almost a century, and thus greatly assisted the growth of the Portuguese Empire. It marks also the beginning of the European colonial dominance in the Asia. It also marks the spillover of the Christian-Islamic power struggle, in Europe and the Middle East, into the Indian Ocean which was the dominant region of international trade at that time.