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Civil War  |  Historic Site

Castillo de San Marcos National Monument

Florida

1 South Castillo Drive
St. Augustine, FL 32084
United States

Built from 1672 - 1695 as a colonial Spanish fortress, it was renamed Fort Marion in 1821 (and reverted to its original Spanish name in 1942). Confederate forces occupied this fort from early 1861 until they withdrew the next year on arrival of a Union naval force.