On This Day - 15 May 1916
Theatre definitions: Western Front comprises the Franco-German-Belgian front and any military action in Great Britain, Switzerland, Scandinavia and Holland. Eastern Front comprises the German-Russian, Austro-Russian and Austro-Romanian fronts. Southern Front comprises the Austro-Italian and Balkan (including Bulgaro-Romanian) fronts, and Dardanelles. Asiatic and Egyptian Theatres comprises Egypt, Tripoli, the Sudan, Asia Minor (including Transcaucasia), Arabia, Mesopotamia, Syria, Persia, Afghanistan, Turkestan, China, India, etc. Naval and Overseas Operations comprises operations on the seas (except where carried out in combination with troops on land) and in Colonial and Overseas theatres, America, etc. Political, etc. comprises political and internal events in all countries, including Notes, speeches, diplomatic, financial, economic and domestic matters. Source: Chronology of the War (1914-18, London; copyright expired)
Fighting on Vimy Ridge.
Austrians force Italians to retreat south of Rovereto (Trentino).
Asiatic and Egyptian Theatres
Russians take Rowanduz (east of Mosul).
Entente blockade Hejaz coast, and assist Sherif of Mecca.
Statement on war aims by Sir Edward Grey.
Sir Roger Casement charged with high treason.
Sig. Boselli, Italian Premier; Baron Sonnino, Foreign Minister.