15 December Soedirman installed as Panglima Besar (supreme commander) of the army.
Allies evacuate remaining Japanese from Aceh; a few Japanese remain to help Republic.
"Social War" breaks out in Aceh: the traditional aristocracy loses in a bloody conflict with Islamic leaders.
Sjahrir, Sjahrifuddin and their followers form Partai Sosialis.
Dutch forces begin to replace Australians as occupying power in eastern areas. Dutch forces increase their presence in the Jakarta area.