The conquest of Oran by the Spanish Empire took place on May 1509, when an army led by Pedro Navarro on behalf of the Cardinal Cisneros seized the North African city, which was controlled by the Kingdom of Tlemcen (Zayyanid dynasty).

In 1505, the Spanish captured the city of Mers-El-Kébir after a successful expedition against the Zayyanids.

In 1507, the Zayyanids ambushed the city of Mers-el-Kébir, with about 11,000 cavalry, gaining a decisive victory against the Spanish forces.

[2] A fleet left port from Cartagena on 16 May and sailed towards Mers el-Kebir, a city located near Oran and already (since 1505) under Spanish control.

[3] The Christians stormed the city of Oran, then part of the Kingdom of Tlemcen, combining the use of the fleet with a ground assault on 18 May.