Marriage between Catherine of Aragon and Arthur
Protect himself against France. Treaty of Medina Del Campo in 1489
Offer support to each other, not harbor rebels and not to make agreements with France without consulting the other.
A marriage between Arthur and Catherine of Aragon
Perkin Warbeck threatened England, which showed how fragile Henry’s position was considered by others. Fernando didn’t want to go ahead with the unrest in England.
The marriage happened in 1502, but was successful after Isabella of Spain died Henry had no interest in relations with Spain.