Skagerrak history of the Anglo-German war for control of the channel 1916

Between 31 May and 1 June 1916 the Battle of Jutland between Germany and England took place, which
 was the main naval battle of the First World War and cost the lives of over 8000 people. Control
 of the Skagerrak was one of the reasons that led to the German invasion of Denmark and Norway 
during World War II.

From a geopolitical point of view, it is the main exit point for Russia's Baltic fleet, a forced
 passage to exit into the Atlantic Ocean; it is therefore of fundamental importance to NATO. 
The alternative would in fact be to exploit the 190 km of navigable waters from the Kola coast
 to the pack, to then descend along the Norwegian Sea and overcome the caudine forks of the GIUK passage.