ww1

Battle of Tannenberg

1914

{Battle of Tannenberg}(https://www.worldatlas.com/articles/major-battles-of-world-war-i-ww1.html)

Austria-Hungary

Jul 28, 1914

{ Austrian-Hungary declared war on Serbia.}(https://www.loc.gov/law/help/digitized-books/world-war-i-declarations/foreign.php)

Battle of Gallipoli

Period: 1915 to 1916

{Battle of Gallipoli}(https://www.worldatlas.com/articles/major-battles-of-world-war-i-ww1.html)

Lusitania Sinks

May 7, 1915

{ Lusitania Sinks}(https://www.shmoop.com/wwi/timeline.html)

Battle of Jutland

1916

{Battle of Juntland}(https://www.worldatlas.com/articles/major-battles-of-world-war-i-ww1.html

Battle of the Somme

1916

{Battle of the Somme}(https://www.worldatlas.com/articles/major-battles-of-world-war-i-ww1.html)

Archduke Ferdinand

Jun 28, 1916

[Assassination of Archduke Ferdinand}(https://www.history.com/news/the-assassination-of-archduke-franz-ferdinand-100-years-ago)

First Tanks

Sep 15, 1916

{First Tanks}(https://www.shmoop.com/wwi/timeline.html)

Battle of Passchendaele

1917

{Battle of Passachendaele}( https://www.worldatlas.com/articles/major-battles-of-world-war-i-ww1.html)

Zimmerman Telegram

1917

{Zimmerman Telegram}(https://www.archives.gov/education/lessons/zimmermann)

China

Aug 14, 1917

{China declared war on Austria-Hungary}(https://wwi.lib.byu.edu/index.php/Declarations_of_War.)

Brazil

Oct 26, 1917

{Brazil declared war on Germany }(

https://wwi.lib.byu.edu/index.php/Declarations_of_War.)

Entry of Armistice Day

Nov 11, 1918

{Armistice Day}(https://www.history.com/topics/world-war-i/world-war-i-armistice-day-celebrations-video)