Diary for Wednesday, April 7, 1915:
Flanders: 1st Canadian Division transferred to Second Army, takes over vulnerable North Ypres salient from French.
Egypt: First units sail for Dardanelles, Hamilton sails for Lemnos next day. Skirmish northeast of Kantara.
North Sea: First successful attempt to direct naval gunfire by radio from an aircraft out of sight, RNAS from Eastchurch directs battleship HMS Revenge to score hits on Maplin Sands range.
Germany: Minority Socialist manifesto against the war.
Britain: War Office begins machinery census for munitions work.