AmericanCivilWarIntroductionSlaverySlaveryhadbeenpracticedinBritishAmericafromearlycolonialdays（殖民时代）,andwaslegalinallThirteenColoniesatthetimeoftheDeclarationofIndependencein1776.奴隶制已经从早期在英国美国殖民时期(殖民时代),和当时在所有13个殖民地法律在1776年的《独立宣言》。Itlastedinabouthalfthestatesuntil1865,whenitwasprohibitednationallybytheThirteenthAmendment.直到1865年，它一直持续到大约一半的州，直到第十三修正案在全国范围内被禁止。SlaveryintheUnitedStates1.SlaverySlaverywasamajorcauseofdisunion.SouthernwhitesbelievedthattheemancipationofslaveswoulddestroytheSouth‘seconomy,duetothelargeamountofcapitalinvestedinslavesandfearsofintegratingtheex-slaveblackpopulation.2.Territorialcrisis(领土危机)3.Lincoln’selection（林肯的当选）Lincoln’sIntroductionUnionvictoryandaftermathUnionflagConfederateArmyflagConfederateArmyflagInfluencesThanksforwatching