American Seacoast Defenses
Forts, Military Reservations and Batteries 1794-1945
Printable list of First, Second and Third System Forts e (123list.pdf)
Printable list of Modern (1890-1945) Defenses, revised January 2017 (cdlist12.pdf)
Army Map Symbol Key (symbols.pdf)
Donations are needed to supported this site!
Are you using the information provided on this site? Please help! The CDSG is a non-profit organization that supports this web site ONLY through the donations of its membership. If you download PDF files from us, please help the CDSG continue to maintain this site by donating a shareware fee. The suggested fees are noted next to each PDF document. Click here for instructions for sending your donation. We suggest a minimum donation of $5.00. If we raise money by this method, we can expand the number of documents posted on this site that will be available for downloading.
Thank you for supporting the CDSG website!
Maps available for download
MAPS: A set of PDF files of Army maps for the 1920s & 1930s are linked to each Harbor Defense listing. Click the links to download. All maps and drawings on this site came from copies of materials in the holdings of the National Archives of the United States. Keys to the identification of the symbols may be downloaded here: Map Symbol Key.
Follow the links on the pages for more information on the harbor defenses from CDSG, FortWiki, and other websites