4 November

Western Front

 * Lombartzyde recovered by the Allies.
 * Battle of Ypres continues.

Eastern Front

 * Galicia: Austrians defeated at Jaroslau; loss of 19,000 prisoners and 40 guns in twelve days.

Asiatic and Egyptian Theatres

 * Armenia: Russian advance from Caucasus Mountains; Diadin occupied.

Naval and Overseas Operations

 * East Africa: British reverse at Tanga.
 * German cruiser SMS Yorck destroyed by a mine near Wilhelmshaven.

Political

 * Persia refuses to join Turkey in war against the Entente.