Ludwell Harrison Johnson III (March 30, 1927 – June 5, 2017) was a professor of history at the College of William & Mary.
His main expertise was the American Civil War, with a focus on the political and economic motives of those who sought independence in the form of a Southern confederacy.
He served in the Naval Reserve from 1945 to 1946 and received his Ph.D. from Johns Hopkins University in 1955.
In November, 1996, Johnson was diagnosed with a rare form of bone cancer.
Johnson died on June 5, 2017, in Williamsburg, Virginia, at the age of 90.