Norway is a Scandinavian country where the Vikings from the 9th century launched raids on the English coast, French and Dutch. Around 900, Harald "fair-haired" is the current King of Norway. In 1380, Norway was united with Denmark. In 1814, Denmark cedes Norway to Sweden. In 1905, Norway became independent and the people chose a constitutional monarchy with Carl of Denmark (Haakon VII) king. Neutral during the First World War, Norway was invaded by German troops in 1940 and will be released in June 1945. The discovery and exploitation of oil deposits in the North Sea is to the country an important source of income and it guarantees independence particularly in relation to the European Union.