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Why did the U.S. Navy blockade Santiago de Cuba harbor?

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The U.S. Navy blockaded the harbor at Santiago de Cuba to contain the Spanish fleet under Admiral Pascual Cervera, which had arrived there on May 19, 1898, during the Spanish-American War.12

The blockade served two primary strategic purposes:

  • Neutralization: By keeping the Spanish ships confined within the harbor, the U.S. prevented them from challenging American naval forces or interfering with military operations elsewhere. While the Spanish fleet remained under the protection of harbor mines and shore batteries, they were effectively neutralized and unable to engage the U.S. blockade squadron.2
  • Support for Land Operations: As U.S. land forces advanced in Cuba, the presence of the Spanish fleet in the harbor posed a threat to those troops. The blockade ensured the Spanish ships could not escape to threaten the U.S. Army or provide support to Spanish defenders, eventually forcing the Spanish admiral to attempt a desperate breakout on July 3, 1898, which led to the decisive Battle of Santiago de Cuba.2