20 October

Western Front

 * Battle round Arras: fierce German attack repulsed.
 * Poelcapelle captured by the Germans.
 * Indian Expeditionary Force (Cavalry, Meerut and Lahore Division) reaches the front.
 * Heavy fighting near La Bassée.

Eastern Front

 * Poland: German attacks in front of Warsaw weakening: Russians begin to take the offensive.

Political

 * Germans report 149,000 French, 107,000 Russian, 32,000 Belgian, and 9,000 British prisoners.
 * British losses to date 57,000, including sick.