Greif was the third of six Type 23 torpedo boats built for the German Navy (initially called the Reichsmarine and then renamed as the Kriegsmarine in 1935). The boat made multiple non-intervention patrols during the Spanish Civil War in the late 1930s. During World War II, she played a minor role in the Norwegian Campaign of 1940 by transporting troops that captured Arendal. Greif spent the next couple of years escorting minelayers as they laid minefields and laying minefields herself. She also spent the latter half of 1941 escorting convoys through the Skagerrak. The boat had a lengthy refit that lasted all of 1942 and then spent March–April 1943 escorting ships in Norwegian waters before returning to France. While deployed there Greif laid numerous minefields and escorted U-boats through