World War II: Norwegian Campaign: Norwegian squads in Hegra Fortress and Vinjesvingen capitulate to German forces after all other Norwegian forces in southern Norway had laid down their arms.

World War II or the Second World War was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks and aircraft played major roles, enabling the strategic bombing of cities and delivery of the first and only nuclear weapons ever used in war. World War II is the deadliest conflict in history, causing the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

The Norwegian campaign involved the attempt by Allied forces to defend northern Norway coupled with the Norwegian military's resistance to the country's invasion by Nazi Germany in World War II.

The Battle of Hegra Fortress was a 25-day engagement in the 1940 Norwegian campaign which saw a small force of Norwegian volunteers fighting numerically superior German forces from a fortified position. After initial fighting around the Meråker Line railway line, the Norwegians pulled back into Hegra Fortress and held off further German attacks before surrendering on 5 May as one of the last Norwegian units active in southern Norway.

The Battle of Vinjesvingen was a battle of the Norwegian campaign and took place in May 1940 in the Telemark county, Norway. It became one of the two last strongholds of Norwegian resistance in southern Norway during World War II, the other being Hegra Fortress.