25 September

Western Front

 * The Aisne: Reims again bombarded.
 * Battle of Albert begun by the Germans to prevent encirclement.
 * Noyon and Lassigny taken from the French.
 * Camp des Romains and St. Mihiel on the Meuse taken by the Germans.

Eastern Front

 * East Prussian Frontier: Russians driven across the Niemen, which they proceed to defend.

Political

 * Paul von Hindenburg placed in command of combined Austro-German offensive in Poland and Galicia.
 * Great Britain: Mr. Asquith's Dublin speech: appeal to volunteers.