WWI Timeline

By Jessica Lou


Triple Alliance


Germany, Austria-Hungary, and Italy created the Triple Alliance

Triple Entente


Britain, France, and Russia created the Triple Entente

Assassination of Archduke


Heir to the Hungarian throne, Archduke Franz Ferdinand was assassinated by Serbian Gavrilo Princip, a part of the Black Hand.

Lusitania sunk


A German submarine sank the British passenger ship Lusitania, leaving 1,198 people dead, 128 of them US citizens.

Trench Warfare


Trench warfare was created on the Western Front to protect from enemy fire.


February, 1916

Germany launched a massive attack against the French near Verdun. Each side lost more than 300 thousand men.

Unrestricted Submarine Warfare


Germans announced their policy of unrestricted submarine warfare, where German submarines would sink without warning any ship in the waters around Britain.

Zimmermann Note

February, 1917

Arthur Zimmermann, Germany's foreign secretary, sent a telegram to the German ambassador in Mexico. The message said Germany would help Mexico conquer the US land if they allied with them. This angered the US.

Russia's collapse

March, 1917

Civil unrest in Russia brought their czar government to a collapse.

US Declares War

April, 1917

President Wilson asked Congress to declare war. They entered the war on the side of the Allies.

Wilson's Fourteen Points

January, 1918

President Wilson drew up a series of proposals, outlining a plan for achieving a just and lasting peace. It was called the Fourteen Points.

Marne River


The Germans sent nearly all its forces to the Western front, but they lost against the Allies at the Marne River.

Treaty of Frest-Litovsk


Germany and Russia signed the Treaty of Frest-Litovsk, ending the war between them.


November, 1918

The Germans signed an armistice, or an agreement to stop fighting. World War I came to an end.

Treaty of Versailles

June, 1919

The Treaty of Versailles between Germany and the Allied powers was signed.