Siege of Diu (1531)
The Siege of Diu occurred when a combined Ottoman-Gujarati force defeated a Portuguese attempt to capture the city of Diu in 1531. The victory was partly the result of Ottoman firepower over the Portuguese besiegers deployed by Mustafa Bayram, an Ottoman expert.
Although Diu was successfully defended, victory was short lived: the Portuguese armada was simply diverted towards more exposed Gujarati cities to the east. Ghogha, Surat, Mangrol, Somnath, Bassein, and many smaller settlements were assaulted and sacked, and some never recovered from the attacks.
In 1534, Sultan Bahadur of Gujarat signed a peace treaty with Governor Nuno da Cunha, granting the Portuguese the territory of Bassein, including Bombay. In 1535, the Portuguese were allowed to construct a fortress at Diu.
