Why did reconquista immediately develop into a conquista? What were the first objects of the Spanish conquest?

The Castilians began the conquest at the beginning of the 11th century, just after the Muslims of Andalusia stopped counter-attacks and went on the defensive. The first target of the Castilian conquistadors was the Canary Islands (Conquered 1402-1410). After the unification of Castile with Aragon and the conquest of Granada, a new stage of the conquest began – the conquest of America.