- The Battle of Lowicz-Sanniki in Poland ends following two weeks’ fighting
- Turkish forces launch attacks on the Russians in the Caucasus area of Northeast Anatolia. Fighting continues until 18 January 1915.
- Turkey wrests the Armenian city of Keuprikeui from the Russians for a second time
- The First Battle of Artois begins. Fighting continues until 13 January 1915; French forces are unsuccessful in their attempt to break the frontline stalemate.