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construct a timeline of the american civil war.
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timeline of the american civil war: 

1860: abraham lincoln is elected president of the united states 

1861: confederate states of america is formed 

april 12th 1861: confederate forces fire on fort sumter in south carolina, beginning the war 

july 21st 1861: first battle of bull run fought in virginia 

september 22nd 1862: battle of antietam fought in maryland 

july 1st-3rd 1863: battle of gettysburg fought in pennsylvania 

april 9th 1865: confederate general robert e. lee surrenders at appomattox 

december 5th 1865: the thirteenth amendment is ratified, abolishing slavery in the united states
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