28 June

Events preceding British Declaration of War

 * Assassination at Sarajevo of the Archduke Franz Ferdinand and his wife the Duchess of Hohenberg.

1915

 * French advance at Souchez.
 * Continued Russian retreat in Galicia.
 * Dardanelles: British attack Achi Baba.
 * No German warships bombard Windau (Baltic).

1916

 * Battle of Verdun: Heavy fighting at Fleury and Hill 321; Germans repulsed north-west of Thiaumont.
 * Heavy fighting on Lutsk salient; Austrians defeated on 25-mile front east of Kolomea; 10,000 prisoners reported; Germans repulsed in Riga district.
 * Italians regain half the trenches lost during the Austrian offensive. Italian cavalry reach Pedescala (north-east of Arsiero).
 * Liebknecht sentenced to two years H.R.L. and dismissal from Army. British abandon Declaration of London.

1917

 * British advance on two-mile front south of Souchez river. Germans positions near Oppy carried. German attack north-west of Verdun; French trenches on Hill 304 captured.
 * In recognition of New Zealand's services, "Governor" changed to "Governor-General". Czech Socialist memorandum published.

1918

 * French capture Cutry Plateau. British success east of Forest of Nieppe (north-west of Béthune). Another air-raid on Paris.
 * Arabs capture Kalaat el Almar (200 miles north of Medina) from Turks.
 * Second USA communiqué in favour of deliverance of all Slavs from German or Austro-Hungarian rule.

1919

 * Post Armistice: President Wilson signs Treaty by which USA will assist France in case of unprovoked German attack. Peace Treaty signed and published.