On This Day - 21 August 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)
British capture enemy positions west and north-west of Lens on front of 200 yards.Verdun front, French take Cote de l'Oie, Regneville (on left bank), Samogneux and fortified trenches connecting village with Hill 344.
Zeppelin raid on Yorkshire, 1 injured.
Enemy attack on Riga front commences.
Russians evacuate positions between Tirul Marsh and River Aa.
Enemy attack town of Sereth (Bukovina) and take one of fortified heights.
Battle in Carso region continues.
Labour Party reaffirm their decision to send delegates to Stockholm.