treaty of medina del campo 1489 = mutual defence; no harbouring rebels; marriage between arthur and catherine
1501 marriage = arthur and catherine
1502 = arthur dies - henry offers son, henry but ferdinand is reluctant as french and spanish relations are good now
after relations deteriorated, he agreed
1504 = isabella of castille died - spain could collapse so he backed phillip
1505 = treaty of blois with france = marriage with louis's niece
1506 = when phillip died, ferdinand gained control with french support and did not need england