World War I Timeline
Timeline Description: World War I, often called The Great War, lasted four years and involved many countries around the world. It was the war that nobody really wanted. Even though almost no progress was made on either side for years, nobody wanted it to end in defeat so they kept on fighting.

Date Event
June 28, 1914 Assassination

Archduke Franz Ferdinand is assassinated in Sarajevo, triggering the outbreak of war.
August 1914 Outbreak of War

War was declared by the various countries involved.
October 1914 First Battle of Ypres

The first battle of Ypres - October to November
December 21, 1914 Air Raids

December 21, 1914 was the first German air raid on Britain
December 24, 1914 Christmas Truce

Soldiers on both sides initiated an unofficial Christmas truce.
February 04, 1915 Blockade of Britain

Germany begins using U-boats to attack British and neutral shipping.
April 22, 1915 Second Battle of Ypres

The second battle of Ypres lasted from April 22 to May 25 and was the first instance of poison gas use by Germany.
April 1915 Gallipoli

The battle of Gallipoli lasted from April to December of 1915.
May 07, 1915 Sinking of the Lusitania

The British liner Lusitania was sunk by German U-boats.
February 1916 Verdun

The battle of Verdun lasted from February to December of 1916.
May 31, 1916 Jutland

The naval battle of Jutland lasted from May 31 to June 1 of 1916.
July 1916 Somme

The battle of the Somme lasted from July to November of 1916.
February 01, 1917 Submarine Warfare

On February 1, 1917, Germany resumed unrestricted submarine warfare.
January 16, 1917 Zimmerman Telegram

A telegram from German foreign secretary, Arthur Zimmerman to Mexico was intercepted by the U.S. The Germans wanted Mexico to declare war on the U.S.
March 15, 1917 Abdication

Tsar Nicholas II abdicates the throne.
April 06, 1917 War Declared

The U.S. declares war on Germany.
April 09, 1917 Vimy Ridge

The battle of Vimy Ridge lasted from April 9 to 12, 1917.
June 25, 1917 U.S. Troops arrive in Europe

U.S. troops began arriving in France on June 25, 1917.
July 16, 1917 Ypres

The third battle of Ypres (Passchendaele) began on July 16, 1917.
November 07, 1917 Bolshevik Revolution

The Bolshevik Revolution in Russia resulted in a Communist government.
December 07, 1917 U.S. Declaration of war on Austria-Hungary

The U.S. declared war on Austria-Hungary on December 7, 1917.
March 03, 1918 Russian Peace Negotiations

Soviet Russia concluded separate peace negotiations with their enemies.
May 1918 U-Boats in U.S. waters

U-boats appeared in U.S. waters for the first time in may of 1918.
November 09, 1918 Abdication

Kaiser Wilhelm II abdicated the throne on November 9, 1918.
November 11, 1918 Armistice

The armistice was concluded, and fighting stopped at 11 am on November 11, 1918.
June 28, 1919 Treaty of Versailles

The Treaty of Versailles was signed on June 28, 1919.