Western Front
Manfred von Richthofen awarded Pour le Merite.
https://en.wikipedia.org/wiki/Pour_le_M%C3%A9rite
Important daylight raid by British aircraft west of Lens.
Eastern Front
Romania: Battle of Pralea: Romanians recapture height between Casin and and Oitoz valleys. Central Powersdriven from Vadeni.
Naval and Overseas Operations
Tripolitania: General Latini’s 5 battalions defeat Senussi near Zuara (until January 17).
East Africa: NRFF takes Malawis bridge over river Ruhudje. Kilwa Force occupies Mohoro and takes Königsberg gun.
Political, etc.
Germany: A7V tank prototype ordered.
At the Pope’s request, Kaiser Wilhelm agrees that he will cooperate in the restoration of the damaged Rheims cathedral.
Germany claims that Allied shelling and air raids have killed 2,557 French and Belgian civilians in occupied areas.
United Kingdom: Despatch from Mr. Balfour in amplification of Allies' Note to U.S.A. communicated to American Government.
Italy: Food Commission appointed.
United States: George Dewey, U.S. Admiral of the Navy (only person to hold the rank), passed away:
http://imgur.com/6S9TXsJ
Greece: Greece government asks the U.S. for help, stating Allied meddling in the country is causing starvation among its people.
Complete acceptance of Allies' ultimatum by Greek Government.