Russia: Petrograd Soviet proclamation appeals for end to fraternization. At STAVKA C-in-Cs discuss resigning en masse, decide to visit Petrograd.
Isonzo: Italian Gonzia Command and Third Army (28 divisions) vs Austrian Fifth Army (11 divisions). Italians attack at noon with main thrust north of Gorizia east of Plava, capturing Hill 383, and Zagora and Mt Santo. East of Gorizia Messina Brigade takes Hills 174 and 126 but forced out by heavy counter-attacks. Badoglio promoted Lieutenant-General (confirmed August 23).
Serbia: Serb Sumadija Division captures 2 spurs a mile from Mt Dobropolje.
North Sea: Royal Navy Air Service Large America’ H12 flying boat shoots down Zeppelin L-22 near Terschelling Light Vessel.
Britain: King tours in Industrial North. Merchant shipbuilding control reverts to Admiralty.
Germany: First German tank (A7V) on trial at Mainz.