On This Day - 13 October 1917
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)
Control of British Air Service reorganised; Maj.-Gen. Salmond succeeds Lt.-Gen. Sir D. Henderson as Director-General.
Germans continue landing on Oesel Island. Detachments landed on Dago Island promptly ejected, Arensburg occupied.
Considerable artillery activity on Upper Isonzo.
Naval and Overseas Operations
Belgians repel German attack south-east of Mahenge.
German mine-sweepers between Courland and Oesel Island.