German invasion of Denmark (1940)
The German invasion of Denmark (German: Operation Weserübung – Süd), was the German attack on Denmark on 9 April 1940, during the Second World War. The attack was a prelude to the invasion of Norway (German: Weserübung Nord, 9 April – 10 June 1940).
Source: Wikipedia — German invasion of Denmark (1940) (CC BY-SA 4.0)