On This Day - 21 May 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)
Hostile counter-attack north-west of Merville fails.
Successful British raids on Lys front and Arras district.
Mannheim, etc., heavily bombed by British airmen.
Raid on Paris by two Gothas, one downed.
Increasing unrest at Kiev; acts of terrorism ineffectually repressed by Germans.
Naval and Overseas Operations
General Edwards' troops come up with enemy's rearguard nine miles south-west of Nanungu.