| Czechoslovak Fortification 1938: Profile of the ultimately futile fortification systems constructed by the Czechs prior to the Nazi invasion. |
| Delaware's Coastal Defenses: History of Fort Miles and Fort Saulsbury and their role in defending the Delaware coast. |
| Fortress Hertfordshire: Jim Apps describes and illustrates what remains of a World War 2 ring of anti-tank ditches and pillboxes built as a final line of defense to prevent the capture of London. |
| Fortweb: Covers European fortifications of the 19th and 20th century, particularly the Maginot Line and Vallo Alpino in Italy. Contains photographs, history and weaponry information. |
| Maginot Line - Ouvrage Immerhof: Site devoted to the Immerhof fortification on the Maginot Line. Description, location and public visit information, glosary, and crew life overview provided in English and French, as well as related resources. |
| Pillboxes: Tim Carter describes and illustrates the types of pillbox used in Second World War defences. Images of 20th-century military architecture in the UK and Europe. Bibliography. |
| The Atlantic Wall: Features the history, original photos and tourist attractions of the German coastal defences in France 1940 - 1944. |
| The Gothic Line: Depicts the history of the last German defensive line in Italy. Also features historical photo gallery, war cemeteries and location photographs of the area today. |
| The Maginot Line: History and description of the Maginot Line of fortifications along the French-German border. |
| The Mannerheim Line: Photographs, drawings, tactical and historical descriptions of the Finnish fortifications that withstood the Russian offensive in the winter of 1940. |
| The Pillbox Study Group: Introduces the most common World War 2 defensive fortifications in the UK. Details the location, background information, history and other resources. |
| UK World War 2 Pillboxes and Anti-Invasion Defences.: Photos of locations in the United Kingdom showing pillboxes and other defences built to resist a German invasion in World War 2. |
| WW 2 Tunnel and Shelter Researching: Offers descriptions of secret tunnels built by the Germans during World War Two for rocket research, and airplane building. |
Classical
