French troops passing time in a trench during the Battle of Champagne. Image courtesy Le Miroir, 27 décembre 1914.
- The First Battle of Champagne begins, marking the first major Allied attack against the Germans since the initiation of trench warfare on the Western Front. The French Fourth Army and the German Third Army engage in combat that lasts until 17 March 1915.
- British troops with Indian reinforcements clash with German troops in the Battle of Givenchy. Allied losses are high; casualties are exacerbated by the inclement weather conditions.
