WW1

Assassination of Archduke Franz Ferdinand

Jun 28, 1914

[Assasination of Archduke (Ferdinand]https://www.history.com/news/the-assassination-of-archduke-franz-ferdinand)

Austria -Hungary declares war on Serbia

Jul 28, 1914

Austria declares war

Germany declares war on Russia

Aug 1, 1914

Germany declares war on Russia and warns England and France not to interfere

Germany declares war on France

Aug 3, 1914

[Germany declare war on france](https://www.nationalgeographic.org/thisday/aug3/france-and-germany-declare-war/

New weapons and new weapons

Jan 12, 1915

In 1915 Germany was the first to use poison gas as a weapon.

Battle of Gallipoli

Period: Apr 25, 1915 to Jan 9, 1916

Battle of Gallipoli

The Lusitania Sunk

May 7, 1915

German submarines sunk the Lusitania.

Battle of Jutland

Period: May 31, 1915 to Jun 1, 1916

Battle of Jutland largest naval battle

Battle of Verdun

Period: Feb 21, 1916 to Dec 18, 1916

Battle of Verdun the longest battle in WW1

Battle of Brusilov Offensive

Period: Jun 4, 1916 to Sep 20, 1916

Brusilov Offensive Russian army had suffered the most

First Battle of the Marne

Period: Sep 4, 1916 to Sep 6, 1916

Battle of the Marne ,Germany hoped to avoid fighting on two fronts.

Zimmerman Telegram

Jan 1, 1917

Was sent from Germany to Mexico asking Mexico to attack the U. S. and keep them preoccupied so they couldn’t join into the war

U.S entry in WW1

Apr 6, 1917

Publication of the letter turned American opinion against the Central Powers

Treaty of Versailles

Jun 28, 1919

[Treaty of Versailles, peace document signed at the end of World War I by the Allied and associated powers and by Germany in the Hall of Mirrors in the Palace of Versailles.][(https://www.britannica.com/event/Treaty-of-Versailles-1919)

Armistice Day

Nov 14, 1919

Armistice Day is commemorated every year on 11 November to mark the armistice signed between allies of WW1 .](https://www.history.com/tag/armistice-day)