The V3 Cannon ('Vergeltungswaffe 3) was a German Supergun employed in World War II based around the idea of a multi-charge principle, specifically a secondary charge that ignitnites mid-flight to increase range. Intended for the bombardment of London, the initial building site was the Pas-de-Calais reigon of northern France. However this site was heavily damaged in allied bobing operation. Later two guns of similar design were commisioned when the project came under the command of the SS. SS General Hans Kammler had the guns placed in a ravine in Ruwer River in Lampaden, about 13 kilometers south of Trier in Germany. On 30th of December 1944 General Hans Kammler was ordered to commence firing on Luxembourg, between then and 22 of February the two guns fired several hundered shells, 44 of which were confirmed hits on populated urban areas, killing 10 and wounding 35. After World War II all gun positions fell under American control, these guns were then transported to the Aberdeen proving ground, Maryland in continental USA for testing and further development. This was canceled in 19 48 when the wepons were scraped. A semi-working model of one of these guns is currently on display in the Mimoyecques museam.