4 April

1915 (Sunday)

 * French make progress south of St. Mihiel (Meuse) and in the Woevre district.
 * Germans take Driegrachten.
 * Russian hospital bombed at Radom (Poland).
 * Russians occupy Cisna and reach Sztropko (Carpathians).
 * Fierce battle at Okna (nezr Czernowitz).
 * Russians defeat Turks at Olty (Armenia).
 * SMS Goeben and SMS Breslau withdraw to Bosporus.
 * Greece: Publication of a further memorandum by M. Venizelos, dated 30 January 1915, on Greek foreign policy.