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Archduke franz Ferdinand assassination
On June 28, 1914 Archduke was assassinated by Gavrilo Princip, a member of the black hand gang. The black gang gang knew Archduke was going to be Sarajevo, so they created a plan to murder Archduke. They ended up killing Archduke and his wife Sophie. -
Germany declares war on Russia
When Austria declared war on Serbia, Serbian's ally Russia started mobilizing for war. Austria's ally Germany demanded Russia to stop preparing for war. When Russia refused Germany declared war on Russia. -
Britain joined the war
Britain declared war on Germany, but rivalry between the two countries had been growing for years. Germany's violation of Belgium neutrality and British fears German domination in Europe. -
Triple entente
The Triple Entente was signed in 1907 between Great Britain, france, and Russia to counter the threat posed by the Triple Alliance of Germany, Italy, and Austria. -
Sinking of Lusitania
The German submarine U-20 torpedoed and sank the Lusitania, a swift-moving British cruise liner traveling from New York to Liverpool, England. Almost everyone died on the boats. -
Italy enters war
Committed to Germany and Austria in the event of a defensive war. They did not view Germany's acts defensive and remained neutral. Finally they entered the war on the allies side. -
Battle of Somme
Began as an allied offensive against German forces along the Western front. This battle turned into one of the most bitter, deadly and costly battles. More than 1 million soldiers had been killed or injured. -
Zimmerman note
The British sent a telegram to a German minister in Mexico offering united states territory to Mexico in return for joining the German cause. They would form an alliance if the United States joined the army. -
Treaty of Brest-Litovsk
The Treaty of Brest- Litovsk was a peace treaty signed on March 3, 1918 between the new Bolshevik government of Soviet Russia and the Central powers, that ended Russia's participation in World War 1. -
League of Nations
The league of nations was an organization created by Woodrow Wilson that was designed to promote peace throughout the world. It was to prevent another World War to happen.