Why was the Battle of Sabine Pass an important victory for the Confederacy?

The Battle of Galveston was a naval and land battle of the American Civil War, when Confederate forces under Major Gen. John B. Magruder expelled occupying Union troops from the city of Galveston, Texas on January 1, 1863. ... Union troops on shore thought the fleet was surrendering, and laid down their arm

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the social contract theory

its many islands, high mountains, and remote peninsulas isolated population centers.