1 May

1915 (Saturday)

 * Second Battle of Ypres: Repulse of German attack on Hill 60; British ordered to withdraw to new line.
 * Germans occupy Shavli and approach Libau (Baltic Provinces).
 * Austro-German offensive towards the Uzsok Pass.
 * Battle of Gorlice-Tarnow begins (see 5 May).
 * Dardanelles: Turks attack the Allied line at Gallipoli.
 * Battle of Dilman (North Persia).
 * Two German torpedo boats sunk by British destroyer in North Sea.
 * Union forces occupy Kubas (German south-west Africa).
 * SS Gulflight torpedoed without warning: damaged, but reaches port. First US ship attacked by German submarine (see 19 February and 13 March).
 * Navigation resumed again between England and Holland.
 * Chinese Note to Japan requiring the restoration of Kiao-chau, and making other demands.