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Franz Ferdinand Assassination
The assassination sparked the beginning of World War I -
Austria-Hungary declares war on Serbia
Austria-Hungary declares war on Serbia after a Serbian man assassinated the Archduke. This leads to other nations joining the war. -
First use of poison gas
The Germans were the first to use poison gas. They used a lethal chemical called chlorine gas against two French colonial divisions at Ypres, Belgium. -
Sinking of the Lusitania
A German U-Boat sunk a passenger liner called the Lusitania. There was a total of 1198 deaths from the sinking. 128 of the dead were American. This sinking increased pressure on President Wilson to enter WWI. -
Wilson reelected
Wilson was reelected because he pledged to keep America neutral. A few months later, the U.S.A. enters the war. -
Zimmerman Note
The Zimmerman Note was sent from Germany to the German embassy in Mexico. It was intercepted by the British. The note asked Mexico to invade Southern U.S.A. to keep America out of the war in Europe. -
U.S. declares war
Wilson pledged to remain neutral during WWI. Most Americans agreed to that. But after the sinking of the Lusitania and the Zimmerman Note, public opinion on the war changed. Wilson asked Congress for a declaration of war against Germany. The U.S. officially entered the conflict on April 6, 1917. -
Bolsheviks led by Lenin overthrow Russian government
The Bolsheviks overthrow the Provisional Government in Russia. They lead Russia to form the Soviet Union. -
War ends
WWI ended on the 11 hour of the 11 day of the 11 month. After the Somme Offensive, Germany realized that they could no longer win the war. The Triple Alliance had been damaged. The leaders of the German army told the German government to end the fighting.Two days later, Germany signed the armistice. -
Treaty of Versailles
The Treaty of Versailles was signed on June 28, 1919, and officially ended the war between Germany and the Allied Powers. Germany was blamed for lots of the damage. This put them in tremendous debt.
