The Black Warrior affair was an 1854 incident touching trade and sovereignty between Spain and its American possessions and the United States.
Black Warrior, a ship in the American coastwise trade, touched at Havana, Cuba on February 28, 1854, on her eighteenth voyage to New York City.
In technical conformity with law, but contrary to informal agreements, Cuban authorities demanded a cargo manifest.
However, the tactics of Pierre Soulé, American minister to Spain, temporarily threatened war.
Linked somewhat with the Ostend Manifesto, the issue remained unresolved until August 1855, when Spain paid an indemnity of $53,000.