This article first appeared on Today in Alternate History exploring a theme from a number of related articles including WI: America Buys Cuba, WI: The US acquired Cuba as a Slave State? and WI Cuba acquired by US in 1854?. The point of divergence is that the U.S. Minister to Spain Pierre Soulé maintains the secrecy of his meetings as per the expressed wishes of US Secretary of State William L. Marcy.
May 19, 1854 -
The acquisition of a Cuban slave state saved the Union from disintegrating into Civil War.Southern expansionists seized this fleeting opportunity to break a political deadlock with abolitionists. It was a moment perfectly crafted for them by the timing of "Bleeding Kansas" occurring during the presidency of Franklin Pierce, a pro-Southern Democrat. A dystopian vision of a future Civil War, this outbreak of violence centered on the question of whether Kansas, upon gaining statehood, would join the Union as a slave state or a free state.
The situation in Cuba was vastly different than newly settled Kansas: the majority of the population were slaves, an institution that had been part of the island for centuries. In the 1800s, independence attempts were underway to overthrow colonial authorities and Africanize the island. Southerners were apprehensive that events in the Republic of Haiti would repeat in Cuba. They cynically used this fear to turn the tables on Northern abolitionists. In so doing, they brought a fresh problem which had been hotly discussed in relation to Mexico: the assimilation of Catholic-faith, Spanish-speaking citizens. A secondary issue was that Cuban statehood would likely destroy the mainland domestic sugar industry, especially in nearby Florida. A further obstacle was the suspension of the neutrality laws being demanded by the Democratic majority on the foreign relations committee, Senators Mason, Douglas, and Slidell.
The biggest problem was Spain would never sell Cuba as it was its last province of its once great empire in the Americas and much Spanish pride and stability depended on holding Cuba. Disregarding these problems, the Southern expansionists' official rationale for annexing the island was recorded in the Ostend Manifesto. National security was the documented reason "justified in wresting" the island from weak Spanish hands. This was intended to prevent Britain or France from adding to Cuba their Caribbean possessions. Trade and sovereignty became the primary issues when Cuban authorities in Havana seized the steamer Black Warrior on a regular trading route from New York City to Mobile, Alabama. Ironically, or fittingly, cotton was the commodity in dispute with the consignees, Charles Tyng and Co. The larger truth of course was that it was trade and sovereignty were driving a wedge inside the Union.
The voyage of the Black Warrior followed customary practices, but a new factor was the over-zealousness of the recently appointed governor, Juan de la Pezuela. A regressive, conservative figure out of time, he insisted upon imposing the peculiarly Spanish methods of navigation laws in Cuba to American shipping, demanding a cargo manifest that the captain refused, having never been asked it before. Cuban authorities seized the ship in response. While this international dispute was symptomatic of the political conditions at the time, the intransigence of Pezuela and the machinations of Southern expansionists clicked into place to ensure the outbreak of war.
The ultimate American war aim was the control of trade across the Gulf or even Caribbean, but her naval forces were ill-equipped for this task. Pezuela was confident, and American victory was far from assured. War dragged on, but as the tide turned toward newly built American ironclads, Spain became interested in a peaceful settlement before it lost more holdings, perhaps even to the Philippines in the Pacific. Victory satisfied not only doves in Congress but also Southerners feeling their ports more secure with American Cuba. Abolitionists eager for statehood in Minnesota were satisfied in 1858 with the addition of another free state, required for maintaining Congressional parity per the Missouri Compromise crafted by Senator Henry Clay of Kentucky in 1820.
Author's Note:
In reality, while the Black Warrior Affair was resolved peacefully, it fueled the flames of Southern expansionism. Whereas the lack of secrecy surrounding the Ostend Manifesto led to exposure, denunciation, and creation of rallying cry for anti-slavery Northerners. Marcy himself summed this up in a letter to Senator Mason dated July 23, 1854, "To tell you an unwelcome truth, the Nebraska question has sadly shattered our party in all the free states and deprived it of that strength which was needed and could have been much more profitably used for the acquisition of Cuba."
Provine's Addendum (with inspiration from comments by Philip Ebbrell):
The Spanish-American War turned to favor American victories just in time to assure Franklin Pierce his bid for reelection in 1860. Culture shock followed the war with Cuban representatives in Washington, leading to a surge in the xenophobic and populist Know Nothing Party, who rallied for such things as an official national language and defense of religious freedom from alleged "Romanist" conspiracies. Catholic immigrants who had typically voyaged to cities on the northern Atlantic Coast began shifting the immigration pattern to Cuba as local Know Nothings carried out campaigns promoting "American-only" ideas.
The debates in Congress took a sharp turn in 1862 with the French invasion of Mexico. While Emperor Napoleon III had anticipated potential friendship in the United States as partners in recolonizing Latin America, Americans rallied behind the Monroe Doctrine. The US demanded France leave the occupation zone, which was an impossibility for Napoleon since the entire matter had been one of honor due to unpaid debts to begin with. The Franco-American War started soon after, lasting several months until it was obvious that the French Navy could not compete with a modernized American fleet thousands of miles closer to home. Mexico became liberated, yet it felt tremendous influence from the US and its ships massed in the Yucatan Channel. Britain would prove the ultimate winner of these nineteenth century wars in which it did not participate, establishing far-reaching colonies in the Pacific that expanded its political and economic footprint.
War had distracted America at large from the issue of slavery for years more, but peace brought promises of change. After much effort from numerous factions in Congress, a final reform in the Thirteenth Amendment abolished slavery while also instilling legal groundwork for a racial code that kept much of the same institutions in place. Slaves were freed, but many of them ended up working in "plantation towns" or, in industrialized cities, "factory towns" where the populace lived in rented property and shopped in stores controlled by wealthy land-owners. Racial tensions kept the working class frequently pitted against each other until the Workers Revolution of the early twentieth century.