Western Front
Battle of the Somme: Rawlinson delays next Fourth Army attack to September 23, he and Haig agree that British cavalry should be withdrawn. Fierce German counter-attack almost retakes Bouchavesnes but driven out after desperate fighting. Canadian Corps pull out of line after 6,000 casualties but fighting again on September 26.
Eastern Front
Rumania: Government requests French Military Mission, now 38 Central Powers divisions facing her.
Brusilov Offensive, Pripet: Germans repulsed near Kovel–Rovno railway and along river Stokhod.
Sea War
Baltic: Much abler Vice Admiral A J Nepenin replaces Kanin as Russian Baltic Fleet C-in-C, but Supreme War Council forbids intensified submarine offensive.
