World War 1 By bds892717 Jun 28, 1914 Assassination of Archduke Ferdinand {Assassination of Archduke Ferdinand} https://www.history.com/news/the-assassination-of-archduke-franz-ferdinand-100-years-ago Jul 28, 1914 Austria-Hungary declares war on Serbia {Austria-Hungary declares war on Serbia} https://www.loc.gov/rr/news/topics/ww1declarations.html
