Skagerrak
History

Older names for the combined Skagerrak and Kattegat were the Norwegian Sea or Jutland Sea; the latter appears in the Knýtlinga saga.

Until the construction of the Eider Canal in 1784 (a predecessor to the Kiel Canal), Skagerrak was the only way in and out of the Baltic Sea. For this reason, the strait has had busy international traffic for centuries. After the Industrial Revolution, the traffic increased and today Skagerrak is among the busiest straits in the world. In 1862, a short cut, the Thyborøn Channel at the Limfjord was constructed in Denmark through Skagerrak from the North Sea by going directly to the Kattegat. The Limfjord supports only minor transports though.

In both world wars, the Skagerrak was strategically very important for Germany. The biggest sea battle of the First World War, the Battle of Jutland, also known as the Battle of the Skagerrak, took place here May 31 to June 1, 1916. In the Second World War, the importance of controlling this waterway, the only sea access to the Baltic, was the motive for the German invasions of Denmark and Norway as well as the construction of the northern parts of the Atlantic Wall. Both of these naval engagements have contributed to the large number of shipwrecks in the Skagerrak.
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