[1] During World War II, Hyman served in the Marines in the South Pacific and there earned his high school diploma.
[1] Hyman was a Ford Foundation Fellow, a Senior Fulbright Lecturer, an Organization of American Historians Lecturer, and a judge for the Pulitzer Prize and the Littleton-Griswold prize of the American Historical Association.
[3] His Era of the Oath: Northern Loyalty Tests during the Civil War and Reconstruction (1954) won the American Historical Association's Beveridge Award.
[4] Hyman was editor, contributor, or joint author: Bodenhamer (2012) says, "The best guide to the constitutional changes brought by the Civil War and Reconstruction is Harold Hyman, A More Perfect Union: The Impact of the Civil War and Reconstruction on the Constitution (1973).
[5] Mayer (2001) says Hyman, "wrote the definitive work on loyalty tests throughout American history.