Winter War Finland. Fighting continues in the Karelian Isthmus as the Finnish forward defensive troops fall back to the Mannerheim Line. The Soviets already have a taste of the Finnish defenses as their losses mount attempting to cross the Taipale River at the eastern end of the Mannerheim Line.
Battle of the Atlantic. Before heading to Germany for repairs, Graf Spee goes hunting in shipping routes of the River Plate estuary (South America). However, the Admiralty has learned of Graf Spee’s sinkings near St. Helena, off the coast of Africa (December 2 and 3). Commodore Henry Harwood, Royal Navy’s expert in engagement of a battleship by smaller vessels, guesses correctly that the German raider will head to the River Plate. He sails his cruiser squadron Force G (HMS Exeter, Ajax and Achilles) from the Falkland Islands.
U-47 sinks the neutral Norwegian ship MV Britta 50 miles off Land’s End, England (6 dead). 25 survivors are picked up by the Belgian trawler Memlinc.