One of the first reasons why tension group between the North and South was because of the Missouri Compromise of 1820. The northern states part of the Missouri Compromise of 1820 but the South did not like this compromise later on in history. the north got most of the Louisiana Territory compared to this cell for northerners thought that this would easily make slavery abolished. There was more free space in the north more free states would come in and this could overrule everything okay in make it illegal. The more 3 states they had them or senators and the more senators or against slavery this couldn't make slavery be abolished.( Document 3) on the other hand the South was very pleased when the the Kansas-Nebraska Act came in at the same time as popular sovereignty. and popular sovereignty people could vote if slavery was allowed or not went against the Missouri Compromise what's of Interest vote if they wanted slavery there or not this man slavery didn't necessarily need to get abolished. Set a nurse would move to territory so slavery could be in those States. This meant slavery could officially be legal forever as well. People from the North and South with the Kansas Nebraska to vote for and against wait for it. This meant slavery could spread easily and a sudden urge for him very happy by this on the other hand the Northerners are very angry.( document 3) in an interview with Eric Bana historian who talked about the role of whispered expansion on slavery. Arizona claims that the westward expansion of slavery Was carried out by the Southwest. Almost every American had experienced or seen slavery during this period of time. According to Eric foner slavery made civilization prop possible. People in the South by the slavery free the upper class to do stuff which was absolutely essential 4 progress. They thought without slavery you could not have civilization. They thought if the slaves would do all