World War 1. By facebooker_1159485587577083 Jun 28, 1914 Assassination of Archduke Ferdinand https://www.ducksters.com/history/world_war_i/assassination_of_archduke_ferdinand.php Jul 28, 1914 Austria-Hungary declares war on Serbia. https://www.history.com/this-day-in-history/austria-hungary-declares-war-on-serbia Aug 1, 1914 Germany Declares War on Russia. https://www.rbth.com/arts/history/2017/08/01/on-this-day-germany-declared-war-on-russia_813264 Aug 3, 1914 Germany declares war on France. https://www.historyplace.com/worldhistory/firstworldwar/index-1914.html Aug 4, 1914 August 4, 1914. Britain declares war on Germany. https://www.historylearningsite.co.uk/world-war-one/causes-of-world-war-one/the-british-declaration-of-war/ Aug 6, 1914 Austria declares war on Russia. https://www.historyplace.com/worldhistory/firstworldwar/index-1914.html 1915 Battle of Somme. Battle of Somme: The Bloodiest Military Battle. https://www.history.com/topics/world-war-i/battle-of-the-somme Apr 25, 1915 The Second Battle of Ypres. The First Use of Poison Gas. https://www.britannica.com/event/Second-Battle-of-Ypres 1917 Battle of Vimy Ridge. The 3 Day Battle. https://www.history.com/topics/world-war-i/vimy-ridge-battle Jan 10, 1920 signing of the treaty of Versailles https://www.britannica.com/event/Treaty-of-Versailles-1919
