Operation Wikinger
Operation Wikinger ( English: "Viking" ) was a sortie into the North Sea by German World War II destroyers ( 1st Destroyer Flotilla ) of the "Kriegsmarine" , in February 1940 . 
<triplet> Operation Wikinger <subj> Kriegsmarine <obj> participant <triplet> German World War II destroyers <subj> Kriegsmarine <obj> operator