The naval Battle of Algeciras takes place in the context of the Spanish Reconquista resulting in a victory for the Emirate of Granada and the Maranid Dynasty over the Kingdom of Castile.

The Battle of Algeciras was a naval battle which occurred on July 25, 1278. The battle pitted the fleets of the Kingdom of Castile, commanded by the Admiral of Castile, Pedro Martínez de Fe, and the combined fleets of the Marinid dynasty and that of the Emirate of Granada, commanded by Abu Yaqub Yusuf an-Nasr. The battle was fought in the context of the Moorish naval expeditions to the Iberian Peninsula. The battle, which took place in the Strait of Gibraltar, resulted in a Muslim victory.

The Reconquista or the fall of al-Andalus was a series of military and cultural campaigns that European Christian kingdoms waged against Muslim-ruled al-Andalus, culminating in the reign of the Catholic Monarchs of Spain.

The Emirate of Granada, also known as the Nasrid Kingdom of Granada, was an Islamic polity in the southern Iberian Peninsula during the Late Middle Ages, ruled by the Nasrid dynasty. It was the last independent Muslim state in Western Europe.

The Kingdom of Castile was a polity in the Iberian Peninsula during the Middle Ages. It traces its origins to the 9th-century County of Castile, as an eastern frontier lordship of the Kingdom of León. During the 10th century, the Castilian counts increased their autonomy, but it was not until 1065 that it was separated from the Kingdom of León and became a kingdom in its own right. Between 1072 and 1157, it was again united with León, and after 1230, the union became permanent.