Finland
Winter War – Battle of Tolvaajarvi: Finns destroy two divisions north of Lake Ladoga, killing 4,000 Russians, capturing 30 guns, 60 tanks and 600 PoWs (ends December 24).
Battle of Kitela: Finns halt Russian 18th and 168th Divisions on northern shore of Lake Ladoga. 18th Division surrounded on January 5 and 168th on January 11, 1940.
Sea War
Liner Bremen arrives in Bremerhaven via Murmansk.
Air War
RAF aircraft carry out nightÂlong ‘security patrols’ over Frisian Islands, the bases of German minelaying seaplanes (patrols repeated at frequent intervals during winter of 1939-40).