Reconquista: The Granada War was effectively brought to an end with the signing of the Treaty of Granada between Castile-Aragon and the Emirate of Granada.

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 Granada War was a series of military campaigns between 1482 and 1492 during the reign of the Catholic Monarchs, Isabella I of Castile and Ferdinand II of Aragon, against the Nasrid dynasty's Emirate of Granada. It ended with the defeat of Granada and its annexation by Castile, ending the last remnant of Islamic rule on the Iberian peninsula.

The Treaty of Granada, also known as the Surrender of Granada or the Capitulations, was signed and ratified on November 25, 1491, between Boabdil, the sultan of Granada, and Ferdinand and Isabella, the King and Queen of Castile, León, Aragon and Sicily. It ended the Granada War, which had started in 1482 and culminated in the siege and battle of Granada, which began in spring 1491.

The Catholic Monarchs were Queen Isabella I of Castile and King Ferdinand II of Aragon, whose marriage and joint rule marked the de facto unification of Spain. They were both from the House of Trastámara and were second cousins, as they were both descended from John I of Castile. To remove the obstacle that this consanguinity would otherwise have posed to their marriage under canon law, they were given a papal dispensation by Sixtus IV. They married on October 19, 1469, in the city of Valladolid; Isabella was 18 years old and Ferdinand a year younger. Most scholars generally accept that the unification of Spain can essentially be traced back to the marriage of Ferdinand and Isabella. Their reign was called by W.H. Prescott "the most glorious epoch in the annals of Spain."