British naval forces bombard Ostend.
Oct. 22 (Mon.)
The Germans counter-attack and gain ground in Houthulst Forest.
A German withdrawal south of Riga.
Oct. 23 (Tues.)
The French attack on the Aisne Front: the German defences are deeply penetrated; Malmaison Fort and other important positions are carried, 8000 prisoners being captured.
The Italian Isonzo and north-eastern fronts are heavily bombarded at many points by the Austro-Germans, the Austrians in this area having been strongly reinforced by Germans.
Oct. 24 (Wed.)
The Battle of Caporetto begins (see Nov. 18): the Italians are strongly attacked in the neighbourhood of Tolmino, on the Upper Isonzo, by Austro-German forces; the Italian Second Army gives way on a twenty-mile front.
Oct. 25 (Thur.)