On This Day - 30 June 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 further enemy defences south-west and west of Lens.
German attack on Chemin des Dames.
Violent artillery action west of Mort Homme (Verdun).
Heavy artillery action in Galicia.
Naval and Overseas Operations
German forces driven from Nyassaland to the Rovuma border by British and Portuguese.
Greece breaks off relations with Germany and Austria-Hungary.
Soviet delegates leave Russia for Socialist conferences in Stockholm, England, France and Italy.