World War l By J.Thomas 1914 Battle Of Tannenberg https://www.worldatlas.com/articles/major-battles-of-world-war-i-ww1.html Jul 28, 1914 Austria-Hungary https://www.loc.gov/law/help/digitized-books/world-war-i-declarations/foreign.php Aug 4, 1914 Britain Declares War On Germany https://www.loc.gov/rr/news/topics/ww1declarations.html Sep 6, 1914 First Battle Of The Marne https://www.iwm.org.uk/history/10-significant-battles-of-the-first-world-war Apr 22, 1915 The second battle of ypres https://www.arcgis.com/apps/MapJournal/index.html?appid=a39bd93162b34d4f90d1b84756dcba4e May 7, 1915 The Lusitania Disaster https://www.loc.gov/collections/world-war-i-rotogravures/articles-and-essays/the-lusitania-disaster/ 1916 Battle of Somme https://www.history.com/topics/world-war-i/battle-of-the-somme Period: Nov 20, 1917 to Dec 5, 1917 Battle of Cambrai https://www.britannica.com/list/battles-of-world-war-i Nov 11, 1918 Armistice Day https://www.history.com/topics/world-war-i/world-war-i-armistice-day-celebrations-video 1919 Signing Of The Treaty Of Versailles https://www.history.com/topics/world-war-i/treaty-of-versailles-1 Jun 28, 1919 Assassination Of Archduke Of Ferdinand https://www.history.com/this-day-in-history/archduke-ferdinand-assassinated