On This Day - 21 September 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)
Enemy's attacks on Tower Hamlets' ridge (Ypres) repulsed. Prisoners now exceed 3,000.
After holding enemy here for 18 months, Russians retire north from Jakobstadt (River Dvina).
Second phase of Isonzo battle closed; neither side can hold Mte. S. Gabriele.
Asiatic and Egyptian Theatres
British bomb and cause surrender of Diwaniya (Euphrates).
Naval and Overseas Operations
German groups broken up west of Kilwa and Lindi; flee south to River Mbemkuru.
Central Powers' reply to Papal Note.
General Alexeiev resigns.
Publication of Count Bernstorff's correspondence with Berlin re: bribing Congress.