27 April

1915 (Tuesday)

 * Second Battle of Ypres: Allied attack north of Ypres checked by use of gas.
 * German advance towards Shavli (Baltic Provinces).
 * Dardanelles: Allies establish themselves across the Gallipoli Peninsula.
 * Russians expel the Turks from Kutur (Persia).
 * Baghdad railway bridge over Euphrates at Jerablus stated to be open for traffic.
 * French armoured cruiser Leon Gambetta sunk by an Austrian submarine in the Adriatic.
 * HMS Queen Elizabeth sinks a Turkish t.b. off Maidos.
 * Submarine HMS E14 sinks a Turkish gunboat Nurel Bahr in the Sea of Marmora.
 * Mr. Churchill announces that 29 prisoners from German submarines are separately confined and specially treated as a reprisal against the German submarine campaign.
 * Ain ed Douleh appointed Persian Prime Minister (see 26 April and 17 August).
 * Mohtashem ed Douleh appointed Persian Foreign Minister (see 26 April and 5 March 1916).