World War I had many theaters, or areas, in which major battles and wartime events took place. These theaters are shown in the diagram.



Dates Events
June 28 Assassination of Archduke Franz Ferdinand of Austria, heir to the Austro-Hungarian throne, who was killed in Sarajevo along with his wife Duchess Sophie by Bosnian Serb Gavrilo Princip.
July 28 Austria-Hungary declares war on Serbia. Russia mobilizes.
July 31 Germany warns Russia to stop mobilizing. Russia says mobilization is against Austria-Hungary only.
August 1 Germany declares war on Russia.
August 3 Germany declares war on France. Belgium denies permission for German forces to pass through to the French border.




February 19 British and French naval attack on the Dardanelles. The Gal1ipoli Campaign begins.
April 25 Allied forces land on Gallipoli, landing at Anzac Cove and Cape Helles.
April 28-June4 Repeat Allied losses at the First, Second and Third Battles of Krithiaat Gallipoli.
May 11 Armistice called at Gallipoli to bury the dead.
August 6-29 Aug6ust Offensive at Gallipoli



January 9 The Gallipoli Campaign ends in an Allied defeat and an Ottoman victory.
August 27 Italy declares war on Germany.
Romania enters the war on the Entente's side. Her army is defeated in a few weeks.
November 21 Francis Joseph I, Emperor of Austria and King of Hungary, dies and is succeeded by Charles I.
December 29 Grigori Rasputin, Russia's éminence grise, is assassinated.


Dates Events
January 16 The German Foreign Secretary Arthur Zimmermann sends a telegram to his ambassador in Mexico, instructing him to propose to the Mexican government an alliance against the United States.
March 15 Czar Nicholas II abdicates. A provisional government is appointed.
April 6 The United States of America declares war on Germany.
November 2 Balfour Declaration: the British government supports plans for a Jewish "national home" in Palestine.
November 5 The Allies agree to establish a Supreme War Council at Versailles.
November 7 The October Revolution begins in Russia. The Bolsheviks seize power.


Dates Event
January 8 Woodrow Wilson outlines his Fourteen Points.
July 17 The Tsar and his family were shot early in the morning by the Bolsheviks.
October 30 The Ottoman Empire signs the Armistice of Mudros.
November 3 Austria-Hungary signs the armistice with Italy, effective November 4.
November 9 Germany: Kaiser William II abdicates; republic proclaimed.
November 11 Germany signs the Armistice of Compiègne. End of fighting at 11 a.m.


Dates Eventa
January 18 Treaty of Versailles between the Allies and Germany: the Peace Conference opens in Paris.
January 25 Proposal to create the League of Nations accepted.
June 28 Treaty of Versailles signed.
July 8 Germany ratifies the Treaty of Versailles.
July 21 The United Kingdom ratifies the Treaty of Versailles
Novmber 10-11 A Banquet in Honor of The President of the French Republic was hosted by King George V and held at Buckingham Palace during the evening hours of November 10. The very first Armistice Day was held on the Grounds of Buckingham Palace on the Morning of November 11. This would set the trend for a day of Remembrance or Remembrance Day for decades to come.


Dates Event
January 10 First meeting of the League of Nations held in London. Official end of World War I.
January 21 The Paris Peace Conference ends.
April 19-26 Conference of Sanremo, Italy, about League of Nations mandates in former Ottoman territories of the Middle East.
November 1 League of Nations headquarters moved to Geneva, Switzerland.
November 15 The League of Nations holds its first general assembly.

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