Ruhrort Ruhrort Ruhrort is a district within the German city of Duisburg situated north of the confluence of the Ruhr and the Rhine, in the western part of the Ruhr area. Ruhrort has the largest river harbour in the World, with quays extending nearly 40 kilometres along the river, and it is the principal inland shipping port in Germany. Ruhrort was founded in 1371 as a customs site and was granted town status in 1551. Due to its convenient position on the junction of two important waterways a shipping guild and a harbour had been created by 1665, mainly for trading
Battle of the Ruhr the Ruhr, Bomber Command estimated about 70% of their aircraft losses were due to fighters. By July 1943, the German night fighter force totalled 550. Through the summer of 1943, the Germans increased the ground-based anti-aircraft defences in the Ruhr Area; by July 1943 there were more than 1,000 large flak guns (88 mm caliber guns or greater) and 1,500 lighter guns (chiefly 20 mm and 37 mm calibre). This was about one-third of all anti-aircraft guns in Germany. Six-hundred thousand personnel were required to man the AA defences of Germany. The British crews called the area sarcastically "Happy Valley"