The Department of the Monogahela was a military department created by the United States War Department during the Gettysburg Campaign of the American Civil War.
The Department of the Monogahela was a military department created by the United States War Department during the Gettysburg Campaign of the American Civil War. (en)
The Department of the Monogahela was a military department created by the United States War Department during the Gettysburg Campaign of the American Civil War. (en)