Here’s a partial list of the ships of the German naval task force that occupied Memel. The task force consisted of the following warships supported by other light naval forces:
Armored Ships (“Pocket Battleships”):
• Deutschland (with Hitler and Vizeadmiral Hermann Densch, the Commander of the Reconnaissance Forces, aboard)
• Admiral Scheer (with Vizeadmiral Wilhelm Marschall, the Commander of Armored Ships, aboard)
• Admiral Graf Spee (Flagship of the German naval force…perhaps under Admiral Hermann Boehm, the Fleet Chief???)
• Leipzig (Generaladmiral Dr. phil. h. c. Erich Raeder, the Commander-in-Chief of the Kriegsmarine, flew his aboard the cruiser from 22-26 March 1939 during the operation)
In Destroyer! German Destroyers in World War II (The Naval Institute Press, Annapolis, Maryland, 1983), M.J. Whitley lists the following destroyers as taking part in the operation:
• Leberecht Maas (Z 1)
• Georg Thiele (Z 2)
• Max Schulz (Z 3)
• Richard Beitzen (Z 4)
• Friedrich Ihn (Z 14)
• Friedrich Eckholdt (Z 16)
• Hermann Künne (Z 19)
However, in German Light Cruisers of World War II: Emden, Königsberg, Karlsruhe, Köln, Leipzig, Nürnberg (Geoffrey Brooks, translator. Greenhill Books, London/Naval Institute Press, Maryland, 2002), Gerhard Koop & Klaus-Peter Schmolke state eight destroyers and nine torpedo boats took part in the operation.
I most heartily welcome any and or corrections/additions!
Additional Source: Koop, Gerhard & Schmolke, Klaus-Peter. Pocket Battleships of the Deutschland Class. Geoffrey Brooks, translator. Greenhill Books, London/Naval Institute Press, Maryland, 2000.