- Allied forces on the Gallipoli peninsula attack Hill 60 in an attempt to consolidate communications between ANZAC Cove and the newly landed British force at Suvla Bay. Their mission fails. A second attack is launched on 27 August, also ending in failure.
- Italy declares war on Turkey
- British forces attack Turkish positions in the Battle of Scimitar Hill. The attack, made in stifling heat and heavy mist, is a failure; British casualties number over 5,000. Many of the wounded perish in scrub fires ignited by bursting shells. Winston Churchill says of the battle:
The British losses were heavy and fruitless … On this dark battlefield of fog and flame Brigadier-General Lord Longford, Brigadier-General Kenna VC, Colonel Sir John Milbanke VC, and other paladins fell.