【正文】 ory. The beginning of the war as a war to safeguard national unity, and later evolved into a new birth of freedom for slaves fighting the Revolutionary War. Question： what is the Civil War？ ? The Americans initiating a war for national unity, later the war evolved into a revolutionary war to liberate slaves. ※background ? 19th century industrial revolution(工業(yè)革命） spread to the United States, the US economy develop rapidly , while the United States won the vast territory in the west and successive it establish of the new western states. ? Whenever founding a new state, there were took place the struggle that allow or prohibit slavery exists within the state. ? Northern bourgeoisie(資產(chǎn)階級(jí)） and the peasantry advocated prohibiting slavery in the new state, and required identified the new state as the Free State. ? Southern slaveholders（奴隸主） try to turn the expansion of slavery to the west, advocate permit the existence of the state of slavery in some new state , and slave owners use its dominance（權(quán)利） in parliament(國(guó)會(huì)） and government, successive victory, thus, aroused indignation（憤慨） of the people of the north. Question :What is the reason of the Civil War? ? In the north, the economic of the capitalist industry and merce（資本主義工商業(yè)） develop rapidly while in the south implement the plantation Negro slavery（種植園黑人奴隸制度） . ? Southern slavery stifled（拖延） the development of industry and