Harbor Defense Portal

Harbor Defense Installations

North Atlantic Kennebec River Portland Portsmouth Boston New Bedford Narragansett Bay Long Island Sound Mid Atlantic Eastern New York Southern New York Delaware Baltimore Potomac Chesapeake Bay South Atlantic Port Royal Sound Savannah Cape Fear River Charleston Jacksonville Beaufort Inlet Fort Lauderdale Miami Beach

Gulf Coast Key West Mississippi Galveston Tampa Bay Mobile Pensacola Freeport Sabine Pass Aransas Pass Calcasieu Pass New Orleans Pascagoula West Coast San Diego Los Angeles San Francisco Columbia Willapa Harbor Grays Harbor Puget Sound Juan de Fuca Strait Hawaii Honolulu Pearl Harbor Kaneohe Bay

Alaska Sitka Seward Kodiak Dutch Harbor Eastern Canada Argentia Halifax Sydney Saint John Saint Andrews Charlottetown Quebec Montreal Kingston Amherstburg Western Canada Victoria Vancouver Prince Rupert Juan de Fuca Strait Panama Cristobal Balboa Philippines Philippines

Coast Fortifications First System Second System Third System Endicott Period Taft Period World War I World War II Other Harbor Entrance CPs Coastal Forts Coastal Batteries Coastal Battery Gun List