The alliance submerged into crisis when Portugal supported Joan of Castile instead of her aunt Isabella I of Castile during the War of the Castilian Succession of 1474–1479, because France also supported Joan's candidature. In the following years, the English collaborated with the Catholic Monarchs - Rodrigo González de la Puebla was sent to London as their first semi-permanent ambassador, their daughter Catharine of Aragon married Henry VII's sons Arthur and Henry and a small group of English soldiers even fought on the Castilian side during the conquest of Granada. However, the struggle of Elizabeth I of England against Philip II of Spain in the sixteenth century led to renewed English support of the Portuguese independence movement that started in 1640 with the crowning of King João IV of Portugal ). England's support for Portugal during their Restoration War further soured Anglo-Spanish relations. England nevertheless meditated the Treaty of Lisbon of 1668 between Portugal and Spain, which saw the independence of the former and the recognition of Pedro II as King.