Fort Monroe, Hampton and the surrounding area played several important roles during the American Civil War (1861–1865). Although most of Virginia became part of the Confederate States of America, Fort Monroe remained in Union hands. It became notable as a historic and symbolic site of early freedom for former slaves under the provisions of contraband policies and later the Emancipation Proclamation. After the War, former Confederate President, Jefferson Davis was imprisoned in the area now known as the Casemate Museum on the base.