World War II in Norway began with the German invasion on April 9, 1940, known as Operation Weserübung. The country was strategically important due to its coastline and access to the North Atlantic. Norway was occupied by German forces, leading to a government-in-exile and resistance movements within the country. During the occupation, Norwegians faced harsh conditions, including food shortages and repression. The Norwegian Campaign involved battles between Allied and German forces, but ultimately, Norway remained under German control until the war's end in 1945. The liberation marked a significant moment in Norway's history, restoring its sovereignty.