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
German searchlights of World War II German searchlights of World War II German searchlights of the Second World War were used to detect and track enemy aircraft at night. They were used in three main sizes, 60, 150 and 200 centimetres. After the end of the First World War, German development of searchlights was effectively stopped by the Treaty of Versailles, it resumed in 1927. At the outset of the war, searchlights were combined with acoustic direction-finders, with the direction-finders guiding the searchlights to the right part of the sky, where they swept until they found the target. Later in the war, the searchlights were radar-directed.