RAF aircraft conducted a photo reconnaissance mission over Kiel, Germany to monitor preparations for the German invasion of Norway. German Kriegsmarine's Marine Gruppe 1 departed Cuxhaven, Germany for Narvik, Norway with 2,000 soldiers on 10 destroyers escorted by battlecruisers Scharnhorst and Gneisenau. Marine Gruppe 2 departed Wesermünde, Germany for Trondheim, Norway with 1,700 soldiers on 4 destroyers escorted by cruiser Admiral Hipper. Both departures were made after nightfall to escape British detection.
