Why didn't the Allies try Dam Buster bombs against the heavily fortified German submarine pens on the coast of France in World War II? - Quora
![3)BREST * - U-BOAT BASES IN FRANCE - B.d.U - U-BOATS IN FRENCH BASES * - Articles - Sixtant - War II in the South Atlantic 3)BREST * - U-BOAT BASES IN FRANCE - B.d.U - U-BOATS IN FRENCH BASES * - Articles - Sixtant - War II in the South Atlantic](https://www.sixtant.net/2011/img/editor/image/FRENCH%20BASES/BREST.jpg)
3)BREST * - U-BOAT BASES IN FRANCE - B.d.U - U-BOATS IN FRENCH BASES * - Articles - Sixtant - War II in the South Atlantic
![Ahoy - Mac's Web Log - The U-Boats pens in the Bay Of Biscay ports. Built after France collapses in June of 1940 Ahoy - Mac's Web Log - The U-Boats pens in the Bay Of Biscay ports. Built after France collapses in June of 1940](http://ahoy.tk-jk.net/Images10July22-2005/SubPens/U-BoatPortsMap.jpg)