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Gavrilo Princup stepped from the Serbian crowd and shot the Archduke and his wife Sophie.
This helped cause WW1 -
Austria-Hungry declared war on Serbia, because of the assniation of Archduke Franz Ferdinand, in which was thought to be a short war.
Ended up not being a short war, but instead ended up becoming WW1 -
Germany, obligated by treaty to support Austria-Hungry, declared war on Russia.
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Germany had to declare war on Russia in order to defend Austria-Hungr. which then made Germany declare on Russia's ally, France.
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Germany invaded Belgium, following a strategy known as the Schlieffen Plan.
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German submarines torpedo the Lusitania without warning blowing it up. Over 1,000 died, 128 of whom were Americans.
This is one of the overt acts that made the US go to war. -
Germany announces unrestricted submarine warfare when the Zimmermann note is written and discovered.
The Zimmermann note, a telegram from the German foreign ambassador in Mexico that was intercepted by British agents, -
Zimmermran Note: a telegram from the German foreign minister to the German ambassador in Mexico that was intercepted by British agents.
It proposed that if war with the US broke out, Germany would support mexico in recovering lost territory. -
President Wilson appeared before Congress to ask to go to war against Germany. On April 4th, Congress agreed.
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After France had fallen, the two German armies would deeat Russia.
Showed that the Allies needed the US's help in the war.
