In the case of the United States Civil War, the Southern states wanted to keep slavery, and so they decided that they would secede from the Union, from the union of states from the United States of America.

在美国内战的情况下，南方各州想要保留奴隶制， 因此他们决定脱离联邦，脱离各州联盟， 脱离美利坚合众国。