Eider Canal Eider Canal The Eider Canal (also called the Schleswig-Holstein Canal) was an artificial waterway in southern Denmark (later northern Germany) which connected the North Sea with the Baltic Sea by way of the rivers Eider and Levensau. Constructed between 1777 and 1784, the Eider Canal was built to create a path for ships entering and exiting the Baltic that was shorter and less storm-prone than navigating around the Jutland peninsula. In the 1880s the canal was replaced by the enlarged Kiel Canal, which includes some of the Eider Canal's watercourse. The canal's watercourse followed the border between the duchies of
White Sea–Baltic Canal the 1920s had been demoted from a town to a village, now became a town again, and a large port. As is discussed further below, during the 1930s a number of smaller naval vessels were transferred from the Baltic to the White Sea in order to provide warships for the Soviet Northern naval Flotilla, that became the Northern Fleet in 1937. There was no action near the White Sea–Baltic Canal during the Winter War of 1939-1940, as during that war the USSR was invading Finland, rather than the other way around. On the other hand, with Germany's full-scale invasion of