11 October

Western Front

 * Battle of Flanders begins, a desperate struggle for the coast lasting for some six weeks and including (a) Battle of the Yser, 16 October, seq. (b) Battle of Ypres, 19 October, seq.
 * Paris heavily bombed.
 * Cavalry fighting near Hazebrouck.

Eastern Front

 * Poland: Germans take Sochaczew.
 * Galicia: Russians forced to raise the siege of Przemsyl, which is reprovisioned from Cracow.
 * Austrians recover Jaroslau.

Naval and Overseas Operations

 * Russian cruiser Pallada sunk by German submarine U-26 in Baltic.