13 January

1915 (Wednesday)

 * Germans recover all Hill 132, and take the heights of Vregny.
 * Russians advance on Lower Vistula and occupy Serpets north of Plotsk.
 * Battle of Kara Urgan (Armenia), which has lasted several days, continues desperately.
 * Turks occupy Tabriz (Persia).
 * Germans attack Jasin (German East Africa).
 * Resignation of Count Berchtold, Austro-Hungarian Minister for Foreign Affairs. He is succeeded by Baron Stephen Burian.
 * British War Council resolve that the Admiralty should prepare for a naval expedition in February against the Dardanelles (see 28 and 30 December, 1914).