Most of the authors were serving or retired officers though enlisted personnel and professional historians also contributed.
In some cases authors detail the actions of units as small as an infantry company, though most battles are presented at the battalion or regimental level.
Many accounts of individual heroism are included, especially actions which resulted in the award of the Medal of Honor.
These provide information which is not appropriate for a purely operational history but is important for an understanding of the Army's activities as a whole during the war.
[2] The operations-oriented volumes and some others were reprinted by The National Historical Society during the 1990s in a 50th Anniversary Commemorative Edition series.
They are 7” x 9” with a hard cover (without a dust jacket) whose face is a black-and-white photograph with the title superimposed.