How a sixteenth-century naval war between Portugal and the Mamluks reshaped global trade
When Portuguese explorers rounded the Cape of Good Hope, they triggered a desperate struggle for control of the Indian Ocean spice trade. The Mamluk Sultanate, a land-based power, found itself forced into an alien naval war that drained its treasury and ultimately paved the way for its own collapse.
The conflict began in the early 16th century as Portuguese armadas systematically targeted Arab shipping to break the lucrative spice trade linking India to Egypt and Venice. By 1504, the Portuguese were destroying dozens of ships, prompting Mamluk Sultan Qansuh al-Ghuri to seek unlikely allies. He courted the Pope and the Venetians, who feared the loss of their spice monopoly, while simultaneously recruiting Ottoman shipwrights and timber to build a fleet. Despite these efforts, the Mamluks remained fundamentally land-minded, viewing naval warfare as an alien and distasteful necessity.
The turning point arrived in 1509 at the Battle of Diu, where the Portuguese viceroy Francisco de Almeida decisively eliminated the Mamluk southern fleet. This defeat, combined with persistent Portuguese blockades of the Red Sea, caused spice prices in Egypt to reach astronomical levels. Desperate to protect their interests, the Mamluks invested roughly 400,000 dinars into further naval defenses and sought direct military cooperation from the Ottomans. By 1513, Portuguese commander Afonso de Albuquerque was even attempting to forge an alliance with Persia to launch a pincer movement against the Mamluks and Ottomans, aiming to seize Cairo itself.
Ultimately, the immense financial and military strain of this maritime struggle crippled the Mamluk state. The focus on the Portuguese front left the Sultanate vulnerable on land, and in 1517, the Ottoman Empire under Selim I conquered Egypt. With the Mamluk Empire disintegrated and the spice trade diverted to Portuguese-controlled routes, Egypt lost its status as a great power. The Ottomans inherited the fight against the Portuguese, but Egypt faded into the background for the next three centuries, its prosperity drained by the shift in global trade dynamics.
Source: Mamluk–Portuguese conflicts
