Conferderate army crossing the Potomac River during the invasion of Maryland, Thomas Nast, 27 September 1862
This image depicts cavalry troops of the confederate army as they forded the potomac river to begin the invasion of maryland in early september 1862. Date: 27 September 1862.
Author: Print of a wood engraving of a drawing by Thomas Nast that was published in Harper's Weekly on 27 September 1862Source: https://commons.wikimedia.org/