Battle of the Atlantic. U-35 is brought to the surface in the North Sea by a concerted depth charge attack involving British destroyers HMS Kingston, Icarus and Kashmir. The submarine crew scuttles U-35 but all 43 men survive and are interred briefly at the Tower of London and before going to P.O.W. camps.
Winter war. The Finnish government vainly tries to restart negotiations with the Soviets, suggesting conciliation or arbitration, in accord with the non-aggression treaty. The Finns even offer to withdraw their troops from the border unilaterally. At midnight, Soviet Foreign Minister Molotov orders the invasion of Finland.