Twelve-mile Swamp lies northwest of St. Augustine between Interstate 95 and U.S. Highway 1, the old King’s Road. The heavily wooded swamp, named for its approximate distance from St. Augustine, is a forbidding area of cypress bogs and palmetto thickets. The swamp has probably changed little since 1812 when, in one violent half-hour, it became the focal point of an extraordinary, undeclared military contest between the United States and Spain.
Alexander, J. H.
"The Ambush of Captain John Williams, U.S.M.C.: Failure of the East Florida Invasion, 1812-1813,"
Florida Historical Quarterly: Vol. 56
, Article 4.
Available at: https://stars.library.ucf.edu/fhq/vol56/iss3/4