16 October

Western Front

 * Aubers, Armentieres, Neuve Chapelle and Warneton occupied by the Allies.
 * Belgians driven out of Houthulst Forest.
 * Battle of the Yser begins with German attack on Dixmude.

Eastern Front

 * Poland: Germans within seven miles of Warsaw, which the Russians prepare to evacuate.

Asiatic and Egyptian Theatres

 * Tsing-tau: General attack begins.

Naval and Overseas Operations

 * HMS Yarmouth sinks the SMS Emden's collier, Markomannia.
 * Cattaro bombarded by the Allied fleets.

Political

 * Italy: Death of Marquis di San Giuliano, Minister for Foreign Affairs.
 * Canadian troops arrive in England.