Eider Canal conservation areas. 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
White Sea–Baltic Canal the USSR in 1941, supported by Finland in the Continuation War, the route of the canal became the front line. On June 23, 1941, the day after the German invasion of the USSR, 16 Finnish commandos were brought to the canal by two German Heinkel He 115 seaplanes, which had taken off in Oulujärvi. The commandos were Finnish volunteers recruited by the German Major Schaller. They wore German uniforms and had German weapons, as the Finnish General Staff did not want to have anything to do with the operation. The commandos' task was to blow up the canal's locks, but,