26 June

1915

 * Battle of the Argonne begins; Crown Prince attacks.
 * Russians repulse heavy German attacks on Bukaczowce-Halicz front (eastern Galicia), but retreat.
 * General Sukhomlinov, Russian Minister for War, resigns; General Polivanov succeeds him.

1916

 * Battle of Verdun: French gain near Thiaumont work. British patrols active.
 * Russians advance west in northern Persia. Turks prepare to leave Mosul. Turks driven from Lake Urmia (Persia).
 * General demobilisation ordered in Greece. Germans threaten to stop Swiss coal supply if their cotton purchases are not delivered.

1917

 * British advance astride Souchez river; La Coulotte occupied.
 * Small Italian withdrawal on Mt. Ortigara.
 * Russians take Serdesht (Persia).
 * Report of Mesopotamia Commission published.

1918

 * British take point west of Vieux Berquin (10.5 miles west of Armentières). German air-raid on Paris.
 * Peace Treaty between Germany and Finland ratified.
 * Labour Conference in London. House of Lords approves principle of League of Nations. Strike of aircraft workers.

1919

 * Post Armistice: Fighting at Berlin and Hamburg.