I don't have any infoboxes ready ATM, but the basic history is that Spain undergoes a full Revolution (1863-1868), an converts to a republic significantly earlier. Britain gets involved in the conflict, I outlined some of the history in the Gibraltar post, but the Caribbean War sees the Spanish royalists in exile over Cuba and Santo Domingo, whilst Puerto Rico gets "purchased" by Britain for a nominal fee. It largely evolves as it did in OTL under American governance, but largely falls into the sphere of influence of Hispanophone Florida which pushes for its accession as a dominion, which it achieves in 1964 by merging with the Virgin Islands.
So I have sort of hinted at this sequence of events, and mentioned parts of it in the Gibraltar post. But here is the Spanish Revolution and three major theatres of it.
The
Spanish Revolution, also known as the
Glorious Revolution, was a period of armed military conflict, alongside social and political upheaval, throughout the Spanish Empire that lasted from 1863 to 1868. The Revolution resulted in the exile of Queen Isabel II to Cuba, the establishment of the First Spanish Republic and the independence of the Catalan countries. It would also lay the seeds for the Spanish Civil War seventy years later and play a role in the outbreak of the Franco-Prussian War in 1870.
Spanish liberals and republicans had long hoped to place one of their own as Prime Minister, however the weakening of Spain's position as a global power, coupled with the loss of much of the colonial empire and the vacillation of Queen Isabel II between liberal and conservative positions led many to begin to see the monarch as the source of the country's difficulties.
The Revolution began on 16 August 1863 when, in a coordinated action, naval forces mutinied in Cadiz and Generals Francisco Serrano and Juan Prim denounced the government and began a rebellion in Madrid itself. The unrest quickly spread across the south of country, forcing the Queen and the Royal Court to flee Madrid for the relative safety of Valladolid. The flight of the Queen led to the
Cortes declaring the throne vacant and although overtures were made to Prince Leopold of Hohenzollern-Sigmaringen and Prince Amadeo of Savoy no willing candidate emerged, leading to the declaration of the Spanish Republic with Francisco Serrano as President. The offer to Prince Leopold would be a direct cause of the later Franco-Prussian War.
Royalists in Spain would find little support internationally, France found itself occupied with the ascendancy of Prussia over the German states while Britain was loath to involve itself in another conflict so soon after the Granadine Civil War. Portugal and Savoy offered material support for a time, but refused to directly engage the growing revolutionary army. The Queen and Court relocated frequently as revolutionary forces overran royalist positions, and by 1868 controlled only parts of Galicia, Leon and Asturias, based in the city of Santiago de Compostela.
The Revolution officially came to an end on 27 September 1868, when royalist, republican, Catalan and British ambassadors met and signed the Peace of Lisbon; recognising the sovereignty of the First Spanish Republic and Catalonia, and provided safe passage to the Queen, her Court and any royalists unwilling to swear allegiance to the new republic to Havana. It would also recognise the existence of the Kingdom of Spain-in-Exile in Cuba and Santo Domingo, although Continental Spain would not recognise that government for its entire existence. Britain's acquisition of the East Indies would lead to the First Philippine Revolution as the native inhabitants of the Philippines sought independence.
The
Caribbean War, also known as the
Caribbean Theatre by modern historians, was the theatre of the Spanish Revolution that took place in and around the Caribbean Sea, predominantly in the Spanish West Indies, which at the time consisted of what is now Cuba, Santo Domingo and Puerto Rico. The Caribbean War began when revolutionary forces in the three territories of the Spanish West Indies rose up against the royalist colonial government, in support of the revolutionaries in Continental Spain.
Historians now consider that the Caribbean revolutionaries had overestimated their support amongst the local population; Cuba was against anything that would disrupt the lucrative trade with Florida, Santo Domingo was loathe to see a return to the violence that characterised the break up of the Granadine Confederation and Puerto Rico was relatively happy with the existing government. However distractions in mainland Spain led to the Caribbean War becoming a long, drawn out affair as royalists and republicans engaged in guerrilla warfare in the towns and countryside.
The British Empire would join the war on the side of Royalist Spain on 4 June 1868, after the HMS
Maine was sunk in Havana Harbour, although historians have been unable to identify the culprits behind the sinking. British forces moved quickly to isolate revolutionary forces, occupying the entire island of Puerto Rico and evicting republican troops from the major cities in Cuba and Santo Domingo. The Caribbean War came to an official end on 27 September 1868 with the signing of the Peace of Lisbon, which saw the establishment of an exiled Spanish Monarchy established over Cuba and Santo Domingo, Puerto Rico sold to the British for a nominal fee and the exile of revolutionary forces from the West Indies. The Kingdom of Spain-in-Exile would last until 1941, when it was dissolved into the Kingdom of Cuba and the Kingdom of Santo Domingo, ruled by two of Queen Isabel II's great-grandsons.
The
Catalan War of Independence, known as the
Catalan Restoration War by 19th century 'romantic' historians', was a military conflict, considered part of the wider Spanish Revolution that was fought in the Catalan-speaking regions of the Kingdom of Spain from 1865 to 1868.
The territories of the former Crown of Aragon had long chaffed under rule by larger Castille, and later Spain, from Madrid, and during the early stages of the revolution many Catalans pledged their support to the revolutionaries in Andalusia. A leading figure in the revolution in Catalonia was Alfons, 7th Count of Cardona, and as it became clear the republican nature of the revolution in the rest of Spain many Catalans recoiled from the idea, largely attributed to the memory of the wars of the French Revolution and Napoleon.
On 21 April 1865 the Spanish Royalist garrison in Barcelona was defeated and captured, and Alfons was crowned as King Alfons VI of the Catalans by the Archbishop of Barcelona. Alfons VI quickly secured foreign support from both France and Savoy, marrying his son and heir to a member of the House of Savoy, and although the First Spanish Republic did not recognise Catalan sovereignty until March 1868, their forces fought alongside the Catalans in many of the fiercest engagements in eastern Spain. The Battle of Calatayud was one of the fiercest in the entire revolution, and the Catalan victory began a period of stalemate in the War of Independence as neither royalists nor republicans could dislodge the Catalan forces.
Although the war is considered to have ended on 19 March 1868 with the recognition of Cataln independence by Francisco Serrano, as with the rest of the Spanish Revolution it did not
officially end until Catalan delegates signed the Peace of Lisbon.
The
Gibraltar Intervention represented the British Empire's only intervention into mainland Spain during the Spanish Revolution, other than the evacuation of the Spanish Court in September 1868. It began shortly after the sinking of the HMS
Maine in Havana and the murder of three British citizens during a crackdown by revolutionary forces in Tangier. Named for the military fortress of Gibraltar, the Intervention saw British forces seize control of the Spanish Maghreb territory, including the cities of Ceuta and Melilla, and the occupation of parts of Southern Andalusia.
The Intervention culminated in the Battle of Marbella in August 1868, where the British took the city and successfully repelled three Spanish attempts to retake it. The fall of Marbella and the threat of a British strike northwards towards Granada and Seville, the headquarters of the revolutionary forces, was a key factor in the republicans suing for a ceasefire and the eventual Peace of Lisbon. Britain retained ownership of the Maghreb territories, and would occupy southern Andalusia for 44 years before returning it to Spain.