World War I

Frans Ferdinand assassination

Jun 28, 1914

This was the event that sparked the first world war ever

Austria-Hungary declares war on Serbia

Jul 28, 1914

Austria-Hungary declares war on Serbia because a Serbian nationalist killed Arch-Duke Franz Ferdinad

First use of gas as a weapon by the Germans

Apr 25, 1915

The Germans had developed a highly effective gas mask to use in wars

Sinking of the Lusitania

May 7, 1915

a German U-boat sunk the Lusitania when it came near British ports killing about 1000 people

Wilson reelected;pledged American neutrality

Nov 7, 1916

When president Wilson was reelected in 1916 when he pledged American neutrality

Zimmermann note

1917

This was a telegram sent from the German foreign secretary Arthur Zimmermann to the German ambassador in Mexico promising that if the United Staes went to war with Germany, the Germans would help Mexico get back its lost territory

U.S. declares war

1917

The U.S. decided to join the war after the Germans continued unrestricted submarine warfare, and the "Zimmemann Note" was intercepted and sent to the U.S. president

Bolsheviks led by Lenin overthrow Russian government

Jul 11, 1917

On November 7th, 1917 the Bolsheviks led by Vladimir Lenin overthrew the provisional Russian government of Alexander Kerensky.

Treaty of Versailles

Jun 28, 1919

This was the most important peace treaties that brought World War I to an end. It ended the battles between Germany and the allied powers

War ends

Nov 11, 1925

The reason World War I ends is because their was a new treaty called The Treaty of Versailles on June 28th, 1919