- War Department. Fourth Army and Western Defense Command.~.Coast Defenses of the Columbia. 3/17/1941-1946
- National Archives at Seattle
Beginning with the Civil War, the U.S. Army recognized a need to provide for coastal defenses in the Pacific NW along the Columbia River and in the Puget Sound. A number of forts, many no longer in service, were built for this purpose.
- Photographic Print