What was the Ostend Manifesto?

The Ostend Manifesto was a confidential 1854 document written by American diplomats outlining the rationale for the United States to purchase Cuba from Spain and declaring that the U.S. would be justified in seizing it by force if Spain refused. Driven by Southern slaveholding expansionists seeking new territory during the Pierce administration, the leak and subsequent publication of the manifesto provoked immediate outrage in the Northern states and Europe, dealing a severe blow to the administration. Consequently, the push for Cuba's annexation was largely set aside until late-century movements for Cuban independence.

What we know

• The Ostend Manifesto was an 1854 document that described the rationale for the United States to acquire Cuba from Spain, implying that the U.S. should declare war if Spain refused to sell. [1, 2]
• American ministers Pierre Soulé, James Buchanan, and John Y. Mason met secretly in Ostend, Belgium, and drafted the dispatch at Aachen, Prussia. [2]
• The document justified the potential use of force against Spain in the name of national security and the expansion of slaveholding territory. [2]
• Publication of the manifesto sparked immediate condemnation in Northern states and Europe, becoming a major political setback and an anti-slavery rallying cry. [2]

Where to go next

• whoWho was Franklin Pierce?
• what caused itWhat was the Black Warrior affair?
• whenHow did the Kansas-Nebraska Act influence territorial debates?
• whereWhere is Ostend located today?
• the bigger pictureWhat role did Manifest Destiny play in American foreign policy?
• an unexpected connectionHow does 1854 American territorial expansion connect to European political pamphlets?Both the Ostend Manifesto and the Communist Manifesto represent defining political manifestos written in the mid-19th century that sought to radically shift international or socioeconomic orders.

Sources

• [1]Ostend Manifesto (Wikidata Q2206248) · CC0 1.0
• [2]Ostend Manifesto · CC BY-SA 4.0
• [3]Ostend · CC BY-SA 4.0
• [4]The Communist Manifesto · CC BY-SA 4.0
• [5]Black Warrior Affair · CC BY-SA 4.0