4 March

1915 (Thursday)

 * Stanislau (Galicia) recaptured by Russian forces (see 19 February); prisoners increased to 19,000.
 * Continued fierce Austrian attacks in the Carpathians.
 * French Government decide to send Expeditionary Force to the Dardanelles (see 16 and 20 February, and 25 April).
 * Dardanelles: Bombardment of the inner forts continued.
 * Submarine SMU U-8 sunk by destroyers in the English Channel; crew taken prisoner.
 * SS Thordis is rammed and sunk by a German submarine.
 * Admiralty decides enemy submarine prisoners cannot be afforded "honourable treatment".
 * Russian Government send circular telegram to Entente Governments laying claim to Constantinople (see 12 March).