Before there were photographers, there were artists like Edwin Forbes (1839-1895) who drew this and wrote:
Gallant charge by two companies of the 6th Michigan on Tuesday morning on the rebel rearguard, near Falling Waters, where part of the rebel army crossed the Potomac. This charge was really a very brilliant and dashing affair. The cavalry numbering not more than fifty or sixty men, charged up a steep hill in the face of a terrific fire, went over the breast works and captured nearly the intire [sic] force of the enemy with two or three regimental battle flags. Our boys were at least two thirds of the men engaged killed and wounded, quite a number of the dead were lying inside the works. This charge deserves an illustration, as it is without exception the most brilliant charge that has been made."