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Franz Ferdinand Assassination
The assassination of Archduke Franz Ferdinand instigated the beginning of World War I -
Austria-Hungary declares war on Serbia
Austria-Hungary declared war on Serbia because of the assassination of archduke Franz Ferdinand and his wife. This war now caused Russia to mobilize. -
First use of gas as a weapon by the Germans
Gas was a big and very effective weapon in World War I. Germany was the first country to use gas a weapon during the War. Their gas had killed many enemy soldiers for Germany. -
Sinking of the Lusitania
The Lusitania was a British passenger liner that held many women and children. The Lusitania was sunk by the Germans and the vessel sank off the end of the Celtic Sea. -
Wilson reelected; pledged American neutrality
Many Americans vastly approved of Wilson's policy of strict U.S. neutrality. This happened as World War I erupted across Europe. Wilson declared the U.S. would remain "impartial in thought as well as in the action." -
Zimmermann Note
The Zimmermann Note was a telegram sent to Mexico from Germany to ask if the U.S. gets involved in World War I for Mexico to attack the United States. This telegram was intercepted by the British. The British then sent a telegram to the Americans warning them about the telegram. -
U.S. declares war
The U.S. declared war on Germany because of Germany's violated unrestricted submarine warfare. The U.S. The U.S. Senate voted in support of the start of the war. -
Bolsheviks led by Lenin overthrow Russian government
Lenin was to overthrow the Russian provisional government. He caused a Russian revolution in 1917. This revolution dismantled the Tsarist autocracy and led to the rise of the Soviet Union. -
War ends
The Germans signed an armistice that had been prepared by Britain and France. At the start of 1918 Germany was in a strong position and was expected to win the war. -
Treaty of Versailles
The Treaty of Versailles was one of the most important peace treaties that was brought to World War I. The Treaty ended the state of war between Germany and The Allied Powers