The conquest of granada by the forces Ferdinand and Isabella completed reunnification?

Yes, the conquest of Granada by the forces of Ferdinand and Isabella in 1492 completed the process of the reunification of Spain. This event marked the end of the Reconquista and the unification of the Christian kingdoms of Castile and Aragon under a single monarchy. With the fall of the Emirate of Granada, the last Muslim stronghold in the Iberian Peninsula, Spain became a unified nation under the Catholic monarchs.