The Germans attack on the Amiens Front, at the junction of the French and British armies; they capture the village of Villers-Bréttoneux from the British but elsewhere are repulsed.
British naval forces (Vice-Admiral Sir Roger Keyes in chief command) raid Zeebrugge and Ostend in the early morning with a view to blocking the entrances to the harbours. Storming parties land on the Mole at Zeebrugge, while three obsolete cruisers, the Intrepid, Thetis, and Iphigenia, filled with concrete enter the harbour; these are sunk at the entrance of the Bruges Canal. Two other block ships, the Brilliant and Sirius, are sunk near the entrance to the harbour at Ostend. In the action at Zeebrugge the British destroyer North Star is sunk.
The famous German airman, Baron von Richthoven, is shot down in the Somme Valley.
April 24 (Wed.)
On the Amiens Front the British recapture Villers-Bréttoneux.
Syria:—Arab forces seize 53 miles of the Hedjaz railway south of Maan.
April 25 (Thur.)
The Germans capture Kemmel Hill.
H.M.S. Cowslip (sloop) is sunk by a submarine off Cape Spartel.
April 26 (Fri.)