Question: The German operation for the invasion of Denmark and Norway in April 1940 was code-named "Weserübung", or "Weser Exercise.", opposing the invasion were which military organisation responsible for the defence of Norway?
Sentence (from "German U-boat bases in occupied Norway"): German U-boat bases in occupied Norway operated between 1940 and 1945, when the "Kriegsmarine" (German navy), converted several naval bases in Norway into submarine bases. Norwegian coastal cities became available to the "Kriegsmarine" after the invasion of Denmark and Norway in April 1940.
Relevant evidence: No