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  allies: France, Great Britain, and Russia
central powers: Germany, and Austria Hungary - 
  
  the assassination of Archduke Ferdinand
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  in 1914 WW1 started, by that time the US was not involved and we kept it that way.
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  the sinking of the Lusitania by Germany
Zimmer man Telegram - 
  
  finally, after 4 years the first world war is over!, it ended with the deduced Armistice, it was a offer of peace!, but when it ended veterans day started from here on out, veterans day is to remember the soldier who have fought with honor in the war.
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  it all started with the great depression, 1924 to 1939