The Catholic Monarchs Isabella of Castile<span>, Queen of </span>Castile<span> and her husband </span>King Ferdinand<span>, King of </span>Aragon<span>, pursued a policy of joint rule of their kingdoms and created a single Spanish monarchy. </span>
Depending on what you mean, it changed when the north saw that slavery was not just, and started goin on the attack on it. Which lead to the whole civil war of confederates vs the union
