World War One Diary for Saturday, August 11, 1917:
Ypres: German counter-attacks east of Ypres, part of Glencorse Wood recaptured.
Rumania: Mackensen forces river Sereth at one point, claims 7,000 PoWs. Rumanian Royal Family leaves Jassy.
Atlantic: Sierra Leone convoys start.
South Atlantic: British liner City of Athens (21 lost) sunk by raider Wolf mine near Cape Town.