World War l

Battle Of Tannenberg

1914

https://www.worldatlas.com/articles/major-battles-of-world-war-i-ww1.html

Austria-Hungary

Jul 28, 1914

https://www.loc.gov/law/help/digitized-books/world-war-i-declarations/foreign.php

Britain Declares War On Germany

Aug 4, 1914

https://www.loc.gov/rr/news/topics/ww1declarations.html

First Battle Of The Marne

Sep 6, 1914

https://www.iwm.org.uk/history/10-significant-battles-of-the-first-world-war

The second battle of ypres

Apr 22, 1915

https://www.arcgis.com/apps/MapJournal/index.html?appid=a39bd93162b34d4f90d1b84756dcba4e

The Lusitania Disaster

May 7, 1915

https://www.loc.gov/collections/world-war-i-rotogravures/articles-and-essays/the-lusitania-disaster/

Battle of Somme

1916

https://www.history.com/topics/world-war-i/battle-of-the-somme

Battle of Cambrai

Period: Nov 20, 1917 to Dec 5, 1917

https://www.britannica.com/list/battles-of-world-war-i

Armistice Day

Nov 11, 1918

https://www.history.com/topics/world-war-i/world-war-i-armistice-day-celebrations-video

Signing Of The Treaty Of Versailles

1919

https://www.history.com/topics/world-war-i/treaty-of-versailles-1

Assassination Of Archduke Of Ferdinand

Jun 28, 1919

https://www.history.com/this-day-in-history/archduke-ferdinand-assassinated