Columbia subject headings:
Harvard subject headings:
Martial law--United States.
Presidents--United States--Powers and duties.
Reconstruction (U.S. history, 1865-1877)
United States--History--Civil War, 1861-1865
Princeton subject headings:
Martial law--United States.
Presidents--United States--Powers and duties.
Reconstruction (U.S. history, 1865-1877)
United States--Politics and government--1861-1865.