当承认奴隶制作为奴隶国之前，白人南方人威胁要脱离联邦，结果1820的密苏里妥协出现了。这一妥协是通过一条线通过路易斯安那购买领土而进行的，北方的奴隶制被禁止，因为纬度的变化是360 – 30，向南移动。
When the application of admission as a slave state was preceded the white southerners threatened secession and as a result the Missouri Compromise of 1820 emerged. The compromise was done with a line to be drawn through the Louisiana Purchase territory with which the slavery in the north was prohibited with the shift of latitude as 360 30’ and was moved towards south.
The southern slavery proponents for proclaiming their equal share rights in the expanding West protested against the protective tariffs. They claimed that they have sacrificed the Southern export economy of agriculture in place of the Northern manufacturers (Smith, 1984). This resulted in the sectional crisis in 1832-33 in which the demand of the constitutional nullification of the federal legislation was rose by the planters of South California which violated the determined interests of the state. The Civil War during 1861-65 was due to the Military and diplomatic reasons between the North and South. The presidency election in 1860 for Abraham Lincoln claimed the lives of 600,000 Americans (Beckert, 2004). As a result of this a serious threatens emerged in the Western Hemisphere for the balance of power. In 1861 after the fall of the Fort Sumter Abraham Lincoln for suppressing the rebel in south called upon 75,000 troops (Hummel, 2013).
The federal government had a superior manpower and the material resources for conducting war in the industrial age. On the other hand the Confederacy has a number of favorable factors for winning the war. For winning the vast territory had to be conquered by North and was even necessary for breaking the will of people of South. The North for winning the war had to make use of the railroads which would have been used for supplying the large military forces (Foner, 1987).