Nazi Germany's occupation of Denmark began with Operation Weserübung 9 April 1940, and lasted until German forces withdrew at the end of World War II following their surrender to the Allies on 5 May 1945. Contrary to the situation in other countries under German occupation, most Danish institutions continued to function relatively normally until 1943. Both the Danish government and King remained in the country in an uneasy relationship between a democratic and a totalitarian system until German authorities dissolved the government following a wave of strikes and sabotage.
The occupation of Denmark was initially not an important objective for the German government. The decision to occupy its small northern neighbour was taken to facilitate a planned invasion of the strategically more important Norway, and as a precaution against the expected British response. German military planners believed that a base in the northern part of Jutland, specifically the airfield of Aalborg, would be essential to operations in Norway, and they began planning the occupation of parts of Denmark. However, as late as February 1940 no firm decision to occupy Denmark had been made. The issue was finally settled when Hitler personally crossed out the words die Nordspitze Jütlands (the Northern tip of Jutland) and replaced them with Dä, a German abbreviation for Denmark.