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-A nationalist secret society from Serbia known as the Black Hand assassionated the austro-hungarian heir to the throne Archduke Fraz Ferdinand
-Because of this event Austria became angered with Serbia's sovernty and wanted it nullified -
-Serbia did not meet Austria-Hungry's ultimatum on justifying the assassination case of the Archduke and Austria-Hungry declared war on Serbia
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-Alllied to Austria by treaty, Germany declares war on Russia because of Russia's mobilisation with Serbia was viewed as an act of war.
-Germany gave Russia a scant warning -
-Germany declares war on France because they are allies to Russia
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-Germany invades Belgium because it is the shortest route to Paris -Britain allied to France by a 75 year old treaty joins the war. Britian is obligated to protect neutral Belgium and provided military and finacial support to France.
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-Germany declared that any British ships or allies to Britian found would be sunk.
-Though Germany was protecting their ammunition, America becomes outraged at loss of American lives on Germany's behalf. -
-Germany promised alliance with Mexico and that they would help them reclaim land from America in Texas, Arizona, and New Mesxico if the U.S. and Germany went to war.
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-The U.S. declared war on Germany and broke the neutrallity when Germany performed unrestricted submarine warfare on America's commercial shipping.
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-Bolsheviks overthrow Tsar Nicholas II led by Valdamir Lenin
