Isabella and Ferdinand Unite Spain - Politics

Even when Spain had become an almost completely Catholic nation, it was still divided. The rival regions of Castille and Aragon vied for control of the Iberian peninsula. They both had land overseas and both were becoming increasingly stronger. With their combined increase of strength and wealth, they began to disagree and argue more often. But however, in 1469, Ferdinand II of Aragon and Isabella of Castile were married and became King and Queen, uniting the two Spanish kingdoms.
After uniting Spain, Ferdinand and Isabella had varying goals for the young nation. Ferdinand concentrated on expanding the Spanish overseas empire by commissioning several explorers to claim land in the New World. He commissioned several well known explorers, including Christopher Columbus. Isabella, on the other hand concentrated on making Spain more Catholic. What followed was the Spanish Inquisition where countless Jews, Muslims, and Pagans were forced to switch to Catholicism or killed. If they did not convert, they were either exiled or murdered.