On This Day - 15 April 1918
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 continues on Bailleul-Wulverghem line, and Germans capture both places.
Very violent artillery action in Luce Valley (Somme).
Finland: Germans report occupation of Helsingfors.
Macedonia: Greek troops cross Struma river and occupy villages in Seres district.
British troops take two villages south-west of Demirhissar.
Naval and Overseas Operations
British Naval forces sink ten German armed trawlers in Kattegat.
Austria: Count Czernin's resignation announced.