The Norwegian campaign was an attempted Allied occupation of northern Norway, during the early stages of World War II. Some early stages of the Allied operation preceded the German invasion and occupation of the Norwegian mainland on 8 April 1940. Planned as Operation Wilfred and Plan R 4, while the German attack was feared but had not happened, HMS Renown set out from Scapa Flow for the Vestfjorden with twelve destroyers on 4 April. British and German naval forces met at the first Battle of Nar