BATTLE OF THE BZURA: major Polish counter-attack across river Bzura, West of Warsaw, develops into largest battle in the campaign (ends September 15).
4th Panzer Division attempts to storm Warsaw outer defences but loses 60 tanks.
Polish CinC, Marshal Smigly-Rydz, sends desperate appeal to General Gamelin, French CinC, for decisive action on Western Front.
First BEF troop convoy crosses English Channel (at night).
France: Identity Cards made obligatory.
Germany: Göring broadcasts: scoffs at RAF leaflet raids and calls for Anglo-German peace agreement.