If you look closely toward the bottom left of the picture you will see at least two Confederate soldiers looking up toward the camera.
The picture is said to be dated to around September, 1862 during Lee’s first invasion of the North. The picture features a column of Confederate soldiers marching somewhere in Maryland, presumably on their way to the Battle of Antietam (Sharpsburg).
The Battle of Antietam represented the highest casualty rate for any single day’s engagement in the Civil War. It was fought on September 17, 1862. Approximately 12,000 Union soldiers were casualties as well as 10,000 Confederates.
The two Confederate soldiers looking up at the camera remain unknown. I’ve always wondered as to their fate.