sea frontier (0 synonym found)

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new frontier

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Definition of sea frontier:

(N) : Sea Frontiers were several, now disestablished, commands of the United States Navy as areas of defense against enemy vessels, especially submarines, along the U.S. coasts.
Definition of sea frontier:

(N) : Sea Frontiers were several, now disestablished, commands of the United States Navy as areas of defense against enemy vessels, especially submarines, along the U.S. coasts.
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