Nazi Germany invades Denmark and Norway on April 9, 1940, during World War II. Known as Operation Weseruebung, it opened a new stage in warfare in which cooperation of air, land, and sea forces was essential for successful offensive operations.
The invasion, in the early stages of WWII shifted the focus of the war to the North Atlantic and allowed Germany to secure secured valuable resources and naval bases for the Atlantic, but the occupation of Norway forced Germany to allocate a large army of 300,000 troops.
