11th May 1915
Western Front
Second Battle of Ypres: Germans bombard Ypres-Menin road.
French take fort and chapel of Notre Dame de Lorette.
Eastern Front
Germans evacuate Shavli.
Austro-German advance in Galicia.
Russians fall back to the San River.
Asiatic and Egyptian Theatres
Russian progress in the district of Tabriz.
Naval and Overseas Operations
French take Eseka (Cameroons).
An early attempt to intercept an airship with a shipborne aircraft takes place in the North Sea when the Royal Navy seaplane tender HMS Ben-my-Chree tries to launch a Royal Naval Air Service Sopwith seaplane to attack a German Zeppelin sighted low on the horizon.
Political etc.
Italian government orders all Italian officers and men in Switzerland to immediately return home and rejoin their regiments.
In a report to the House of Commons, Britain has lost 201 merchant vessels and 1,556 civilian lives due to enemy naval action.
Estimates show that U.S. insurance companies will pay up to $1.05 million ($25.1 million today) for the Lusitania sinking.
British newspapers attack U.S. neutrality with the phrase: “Too Proud to Fight.”