Maquis (World War II) Normandy, the Maquis and other groups played some role in delaying the German mobilization. The French Resistance (FFI "Forces Françaises de l'Interieur" for "French Forces of the Interior") blew up railroad tracks and repeatedly attacked German Army equipment and garrison trains on their way to the Atlantic coast. Thanks to coded messages transmitted over the BBC radio, each Maquis group was alerted of the impending D-Day by listening for seemingly meaningless messages such as "the crow will sing three times in the morning" or any other pre-arranged messages read in a continuous flow over the British airwaves. As Allied troops
Bombing of Friedrichshafen in World War II and the "Zahnradfabrik Friedrichshafen" (literally "gearwheel factory Friedrichshafen") tank gearbox factory. In February 1944 an underground factory at Immenstaad near Friedrichshafen was suspected to be a synthetic oil and/or liquid oxygen plant. Near Überlingen, forced labor of KZ-Häftlinge im Goldbacher Stollen, KZ Nebenlager Raderach and the Aufkirch subcamp of Dachau concentration camp was used for constructing an underground facility for armament manufacturing (code name "Magnesit") safe from Allied air raids. Bombing of Friedrichshafen in World War II The German city of Friedrichshafen was bombed during World War II as part of the Allied strategic bombing campaign against German war materiel