Henry VIII married Catherine of Aragon in 1509. Good relations with Spain were the cornerstone of Henry’s foreign policy, since he was normally anti-French.
As France was more populous and wealthier than England, it was assumed that England would need an ally if she were to prevail in war.
Relations with Spain cooled in 1512 when an English expedition to Aquitaine in France did not receive the Spanish help, which Ferdinand had promised.
In 1513, relations again broke down as Ferdinand agreed a one-year truce with France after he had promised a joint attack on France with Henry and the Emperor Maximilian.