submarine | pen name | Jean-Marie Le Pen | nuclear submarine | Anti-submarine warfare | anti-submarine warfare | Trident submarine | Pen | pen | Ohio-class submarine | Japanese submarine I-17 | Type 212 submarine | Submarine-launched ballistic missile | Soviet submarine S-363 | PEN International | PEN American Center | German Type VII submarine | Dundee International Submarine Memorial | United States Submarine Veterans of World War II | Type 214 submarine | Type 209 submarine | Tango-class submarine | Submarine snorkel | Submarine Service | Submarine Escape Immersion Equipment | Submarine (baseball) | Submarine (2010 film) | Submarine | Soviet submarine K-278 Komsomolets | Soviet submarine K-129 |
He preferred fixed installations along the lines of the virtually impregnable U-boat pens that had been built to protect Germany's U-boat fleet.
Part 3 - Warsaw Ghetto, Gestapo headquarters, Pawiak Prison, Palmiry massacre site, Oskar Schindler's Deutsche Emalia Fabrika, Kraków-Płaszów concentration camp, Auschwitz-Birkenau, Treblinka, Fermont, Immerhof and Hackenberg on the Maginot Line, Compiègne, tomb of Napoleon and the German submarine pens and Cross-Channel guns in Normandy and the Pas-de-Calais.