9 October

Western Front

 * Antwerp occupied by Germans.
 * Düsseldorf: Zeppelin sheds raided by Allied airmen.

Eastern Front

 * East Prussia: End of Battle of Augustovo: Germans defeated.
 * Poland: Austro-Germans approach Ivangorod: beginning of a twenty-days' struggle.

Political

 * Italy: Cabinet crisis: resignation of General Grandi, Minister for War.