Why was the American civil war?

Why was the American civil war? Who was the president during the American Civil War? What was the cause of the American Civil War? who was the president during the american civil war in american after the civil war,slavery was done away___ why does the civil war era have a hold on american historica SAT 语法求解释：during the american civil war, The influence of American civil war南北战争的影响是什么? The influence of American civil war?(南北战争的影响) American Civil War (1861 - 1865) What was the significance of the Civil War?209 选择 The American Civil War lasted four years ____ the North w