The onset of Spanish exploration in the Western Hemisphere (late 15th century) coincided with the completion of the Reconquista—the Catholic conquest of Muslim-ruled Iberia—but the two were driven by distinct motives and actors.
Centuries-long struggle between Christian kingdoms and Muslim emirates, culminating in the fall of Granada to Ferdinand II of Aragon and Isabella I of Castile.
Motivated by:
The same Catholic Monarchs who finished the Reconquista sponsored Columbus's voyage. Missionaries often accompanied conquistadors. However, exploration was a separate, multifaceted enterprise—not a direct extension of the Reconquista itself.