List of tributaries of the Danube
The Danube is Europe's second-longest river. It starts in the Black Forest in Germany as two smaller rivers—the Brigach and the Breg—which join at Donaueschingen, and it is from here that it is known as the Danube, flowing generally eastwards for a distance of some , passing through several Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania.
Nazi rule over the Danube River
Before World War II, international trade and commerce at the mouths of the Danube River, as well as many of the physical works needed to keep vessels from running aground, were regulated by an international agency called the European Commission of the Danube, founded in 1856. By the time the Hitlerian invasions began in 1938 the commission was composed of the riparian (river-bordering) states, plus France, Great Britain, and Italy, the chief commercial nations of Europe at that time. Above Brăila, the river was under the control of the International Danube Commission, a body composed only of the riparian states.