Battle of the River Plate. Capt. Langsdorff releases 61 prisoners held on Graf Spee. He requests two weeks for repairs in Montevideo. British naval attaché, Henry McCall, presses Uruguay to expel Graf Spee within 24 hours, per international law. Uruguay compromises and gives Graf Spee 3 days. Royal Navy’s Harwood is furious at the prospect of Graf Spee sailing against his depleted cruiser force. Fortunately, heavy cruiser HMS Cumberland arrives at 10 PM to replace the damaged HMS Exeter, sailing directly from the Falkland Islands in 34 hours.
League of Nations expels USSR for the invasion of Finland in violation of Soviet-Finnish non-aggression pacts (1932 and 1934) and the League of Nations Charter (signed by USSR in 1934).
Hitler orders OKW to plan for an invasion of Norway (codenamed Studie Nord) to protect crucial supplies of iron ore from Sweden.