From the Union of the Crowns of Castile and Aragon to the Habsburg Succession Crisis
Between the late 15th and early 18th centuries, the Crowns of Castile and Aragon were linked by the dynastic union of Isabella and Ferdinand. During this period, the Spanish Monarchy expanded its territories in the Americas and Europe and increased its involvement in international conflicts, until the succession crisis caused by the death of Charles II without an heir.
Below you will find the main events that took place in October:
October 19, 1469 – Marriage of Isabella of Castile and Ferdinand of Aragon
Isabella, Princess of Castile, and Ferdinand, Prince of Aragon, were married in Valladolid on October 19, 1469, linking the two Crowns. However, this did not unite them into a single kingdom, as each retained its own laws, institutions, and governing bodies, although after ascending the throne, both ruled their respective Crowns jointly and acted in a coordinated manner in foreign policy and military campaigns.
October 12, 1492 – Christopher Columbus Reaches the Americas
The expedition, financed by the Crown of Castile, sought to reach the Indies by sailing west across the Atlantic due to the difficulties of accessing eastern trade routes. However, upon reaching Guanahaní, Columbus believed he had arrived near Asia and named it San Salvador.
This voyage began the exploration and subsequent European conquest and colonization of the discovered lands, incorporating new possessions into Spain and thus contributing to the expansion of the Spanish Monarchy.
October 28, 1492 – Christopher Columbus Reaches Cuba
During the same voyage, only 16 days later, the expedition reached Cuba, which Columbus named Juana in honor of Prince Juan. There, due to its size and characteristics, he believed it might be part of the Asian continent and continued exploring the coast in search of a passage to the Indies.
Cuba later became one of the main bases of the Castilian presence in the Caribbean.
October 7, 1571 – Battle of Lepanto
The Holy League was an alliance formed primarily by the Spanish Monarchy, Venice, and the Papal States to confront the expansion of the Ottoman Empire in the Mediterranean. Under the command of John of Austria, its fleet faced the Ottoman fleet in the Gulf of Patras on October 7, 1571. The combatants on the side of the alliance emerged victorious, thereby halting Ottoman naval expansion and securing Christian control of the western Mediterranean.
October 31, 1571 – The First News of the Victory at Lepanto Reach Spain
Although the battle that took place as part of the confrontation between the Holy League and the Ottoman Empire over control of the Mediterranean occurred in early October, the victory of the alliance led by John of Austria was reported in Spain several weeks after the battle, on the last day of the same month. However, this did not prevent the triumph from having a major political and symbolic impact, as it bolstered the prestige of the Spanish Monarchy and confirmed its role as one of the Mediterranean's leading naval powers.
October 2, 1700 – Charles II Makes His Will
Charles II, the last monarch of the House of Austria, had no offspring, so he named Philip of Anjou, grandson of Louis XIV of France, as his heir. However, several European powers rejected this succession because the union of the French and Spanish Crowns could alter the balance of power in Europe. Consequently, England, the United Provinces, and the Holy Roman Empire supported Archduke Charles of Austria as an alternative.
The dispute sparked the War of the Spanish Succession, and the conflict ended with Philip's recognition as King of Spain under the name Philip V and the establishment of the House of Bourbon on the throne.
