Aisne: Sir J French orders BEF to entrench; 6th Division arrives at Aisne. Haig Diary ‘… our gunners cannot “take on” the enemy’s heavy batteries’. British armoured cars (Commander Samson RNAS) rout Uhlans near Doullens. French Fifth Army reaches Craonne Plateau.
Silesia: New German Ninth Army formed to cover Silesia between river Oder and Polish frontier.
Galicia: Russians advance on Przemysl.
Serbia: Serb counter-attack recaptures some heights around Krupani until September 18 before long trench stalemate ensues. Austrians and Krauss Corps gain two bridgeheads south of river Sava before similar stalemate appears.
Italy: Prime Minister Salandra discovers Army’s lull shortages in artillery, officers, winter clothing and horses – it confirms his neutrality policy.
Turkey: British Naval Mission leaves Turkey. Turkish Army mobilization virtually complete in 4 armies (13 corps with 36 divisions or c. 400,000 men with 1000 guns).
Cameroons: HM Gunboat Dwarf, though rammed, sinks the armed vessel Nachtigal on river Bimbia.