Its provisions accomplished three goals: the establishment of a common policy for the two countries regarding France, the reduction of tariffs between the two countries, and, most centrally, the arrangement of a marriage contract between Arthur Tudor, eldest son of Henry VII of England, and Catherine of Aragon, daughter of Isabella I of Castile and Ferdinand II of Aragon.
[1] Henry VII Tudor had risen to the throne of England with his victory over Richard III Plantagenet at the Battle of Bosworth Field.
By comparison, the Spanish were able to retire from military support if they recovered from France the much smaller districts of Roussillon and Cerdanya.
[2] Finally, by the provisions of the treaty, certain tariffs were to be dropped between the countries, allowing a more free trade to develop, though it did cost Castilian merchants certain privileges of theirs.
Henry's foreign policy during 1489 and 1490 attempted to obtain substantial support from either the Spanish monarchs or Maximilian I Habsburg, the Holy Roman Emperor, before he would commit to war against France.