Battle of Diu
1509 CE.
Shown on the map at 20.000°, 71.000°.
The Battle of Diu was a naval battle fought on 3 February 1509 in the Arabian Sea, in the port of Diu, India, between the Portuguese Empire and a joint fleet of the Sultan of Gujarat, the Mamlûk Burji Sultanate of Egypt and the Zamorin of Calicut. The Portuguese victory was critical: the great Muslim alliance was soundly defeated, easing the Portuguese strategy of controlling the Indian Ocean to route trade down the Cape of Good Hope, circumventing the historical spice trade controlled by the Arabs and the Venetians through the Red Sea and Persian Gulf. After the battle, the Portugal rapidly captured several key ports in the Indian Ocean including Goa, Malacca, and Ormuz. The territorial losses crippled the Mamluk Sultanate and the Gujarat Sultanate. The battle catapulted the growth of the Portuguese Empire and established its political dominance for more than a century. The Battle of Diu marked the superiority of Portuguese shipbuilding, artillery and naval tactics over local resources.
Text from the Wikipedia article Battle of Diu, licensed CC BY-SA 4.0.