This site is dedicated to providing photographs and other information on American Seacoast Defenses of the modern era (i.e., 1890s to WWII). In presenting this material I will assume that you already know a bit about the subject and not explain all of the basic concepts.
That said, I hope you find the information presented here enjoyable and enlightening. The various installations are sorted by which Harbor Defense they are located in and then by installation type (although there is a location list provided as well).
Please take a moment to read the Disclaimers and Conditions of Use page and also the Thanks page.