
(1971), co-authored with his wife. He served as the director of research for Bruce Catton's. Centennial History of the Civil War. A meticulously researched, chronological account of the war, covering military actions, political developments, and daily life from November 1860 to May 1865. Long accumulated roughly 7 million words of research on the Civil War, contributing significantly to the field.
He was a professor of American Studies at the University of Wyoming and a noted expert on the conflict. He worked closely with historian. Long's work is considered essential for both professional historians and enthusiasts due to its comprehensive, day-by-day structure and detailed focus.