Rhine-Ruhr transportation from any point in the Rhine Ruhr area to the venue and return. Duisburg Port (Duisport) and Dortmund Port are large industrial inland ports and serve as hubs along the Rhine and the German inland water transport system. The region is host to numerous large events, comprising fun fairs and cultural events like the Cologne and Düsseldorf carnivals (carnival is however a public event in almost all cities and towns of the area), the Cologne Comedy Festival, Ruhrfestspiele Recklinghausen, and the RuhrTriennale, as well as gamescom and other trade fairs at koelnmesse—Cologne Trade Fair and Messe Düsseldorf; and Essen
Battle of the Ruhr or the "valley of no Return". During the battle other German targets received large attacks. In his study of the German war economy, Adam Tooze stated that during the Battle of the Ruhr, Bomber Command severely disrupted German production. Steel production fell by 200,000 tons. The armaments industry was facing a steel shortfall of 400,000 tons. After doubling production in 1942, production of steel increased only by 20 percent in 1943. Hitler and Speer were forced to cut planned increases in production. This disruption resulted in the "Zulieferungskrise" (sub-components crisis). The increase of aircraft production for the "Luftwaffe" also came