Western Front
Battle of the Somme: German attacks north and northeast of Pozieres. British attack outskirts of Guillemont.
Eastern Front
Galicia: Lechitski resumes offensive with gas shell preparation, advances 12 miles to Stanislau, takes it with 10,581 (3,500 German) PoWs (August 10), identifies German Karpatenkorps arriving from Verdun (August 8).
Southern Fronts
Isonzo: Lambro and Etna Brigades storm Hill 188 and Peurna heights. Some Cuneo patrols reach Isonzo in night. Austrians blow up rail bridge and counterattack at Grafenberg.
Sea War
Italy: Royal Navy transfers 4 ‘W’-class submarines (some of them on August 23) small submarines to Italian Navy.