15 July

Events preceding British Declaration of War

 * Count Tisza makes statement in Hungarian Chamber concerning relations with Serbia: they "must be cleared up".

1915

 * - Failure of Germans in attempt to reach left bank of Yser results in heavy losses.
 * - New German offensive towards Riga develops. Germans storm line south of Zielovna (near Przasnysz), and force Russians to retreat towards the Narev.
 * - Italian offensive in Upper Cadore develops (Dolomites).
 * - Strike of Welsh miners begins.

1916

 * - British advance continued; capture of Delville Wood, penetrate to Bois des Foureaux and outskirts of Pozieres; 2,000 prisoners taken; second defence lines penetrated; British cavalry in action.
 * South of Somme, Germans re-enter Biaches and La Maisonette, and are again driven out by French.
 * - Riga front Russians, supported by sea and land artillery, make slight advance west of Kemmern.
 * Southern Lutsk salient Russians under Sakharov, anticipating Austrian offensive, attack them on Upper Styr.
 * - Russian right wing, under General Yudenich, occupies Baiburt; the left drives back Turks south-west of Mush.

1917

 * - German assault on captured positions on Mont Haut (Moronvillers) defeated.
 * British air raid on Belgium.
 * - Enemy opposition stiffening in Galicia; slight enemy success south of Kalusz.
 * - Italian raid in the Carso, 275 prisoners.
 * - Crisis in Russia: resignation of four Ministers of Cadet Party, as protest against recognition of the Ukraine.

1918

 * - Second Battle of the Marne begins'. Great German offensive on front of 50 miles east and west of Reims, from Chateau-Thierry on west to Main de Massiges on east. On east Germans held in check. On west Germans penetrate two or three miles on 20-mile front; cross Marne between Dormans and Fossoy (west of Chateau-Thierry).
 * Americans repulse Germans at Vaux.
 * No - British transport Barung sunk by German submarine. French transport Djemnah torpedoed and sunk in Mediterranean, 442 lost.
 * - Field-Marshal Conrad von Hotzendorf (Austria) placed on retired list.