e/Sea Frontier

Information
has gloss	eng: Sea Frontiers were established by the United States Navy from 1 July 1941 during World War II as areas of defense against enemy vessels, especially submarines, along the American coasts. Sea Frontiers generally started at the shore of the United States and extended outwards into the sea for a nominal distance of two hundred miles.
lexicalization	eng: Caribbean Sea Frontier
lexicalization	eng: Gulf Sea Frontier
lexicalization	eng: Sea Frontier
instance of	c/United States Navy sea frontiers