This seminar explores constitutional and legal issues posed by the attempted secession of eleven states of the Federal Union in 1860-1865 and the civil war this attempt triggered. Issues to be examined include the nature of secession movements (both in terms of the constitutional controversy posed in 1860-1861 and modern secession movements), the development of the "war powers" doctrine of the presidency, the suspension by the writ of habeas corpus, the use of military tribunals, and abuses of civil rights on both sides of the Civil War.