Britain: BEF Tank Corps Lieutenant-Colonel JFC Fuller writes ‘Plan 1919’ for Allied tank (4,992 requested) and allvehicle breakthrough on broad front. Haig receives revised version July 21. Foch agrees in principle August 6.
Flanders: Gas shelling of British at Nieppe forest (Arnnentieres).
Aisne: 12 tanks from German lines unable to cross French ‘Bardooelles Trench’.
Germany: Thyssen blast furnaces and iron/steel works Hagendingen attacked by 8 DH9s of No 99 Squadron (which shoot down 1 fighter).