The naval Battle of Diu was a critical sea battle that took place on 3 February 1509 near Diu, India, between Portugal and a joint fleet of Mamlűk Burji Sultanate of Egypt, Ottoman Empire, Calicut and the Sultan of Gujarat, with technical maritime assistance from the Republic of Venice and the Republic of Ragusa (Dubrovnik).
This battle is critical from a strategic perspective since it marks the beginning of the dominance of the Europeans in the Asian naval theatre, and a defeat for the then dominant power - the Ottoman Empire. It also marks the spillover of the Christian-Islamic power struggle in Europe and the Middle East, into the Indian Ocean which was a dominant arena of international trade at that time.
The battle parallels Lepanto (1571), Abu Qir (1798), Trafalgar (1805) and Tsushima (1905) in terms of its impact, though not in scale. Had the Turks won India would've become a Muslim dominion, and by extension an arm of the expanding Ottoman Empire in the East.
The Egyptian fleet, manned mostly by Turks, was sent by the Mamlűk Burji Sultan of Cairo, Al-Ashraf Qansuh al-Ghauri, in 1507 to support, at his invitation, the then Muslim Sultan of Gujarat, Mahmud Begada who had his capital at Champaner, a town about 48km from the major city of Vadodara.
The Sultan, sensing a political vacumn in Western India, had persuaded the Turks and the Egyptians that the opportunity was right for a Muslim-dominated dominion in that part of India. Mir Hussein Pasha,was the Turkish Commander of the Egyptian-Gujarat squadron. The spoils of the battle also included three royal flags of the Mamlűk Sultan of Cairo, that were sent to Portugal and are even today displayed in the Convento de Cristo, in the town of Tomar, spiritual home of the Knights Templar.
Excerpted from Mavi Boncuk blog.