Explores the subterranean architecture in Berlin. Features history of the Berlin underground systems and their development during World War II and beyond. Available in English, German, Spanish and French.
A German military history research site covering the time between 1918 and 1945. Includes articles, forums, biographies and book dealers that specialize in this period.
Organization for researchers and scholars of German history. Information on the Society, events and conferences. Includes journal and links to research tools.