Antietam-The Day After the Battle-by Alexander Gardner
Long considered the only known Civil War view of a battle in action, Gardner’s photograph actually shows reserve artillery east of Antietam the day after the battle. What was thought to be the smoke of guns covering the fields in the center and right distance is fog or early morning mist. 
Although more than twenty-six thousand soldiers were killed or wounded in fierce fighting, Robert E. Lee’s first invasion of the North was soundly repelled by McClellan and the Confederate general was forced back into Virginia.
Albumen silver print from glass negative-Gilman Collection, Purchase, The Horace W. Goldsmith Foundation Gift, through Joyce and Robert Menschel, 2005 Heilbrunn Timeline of Art History 

Antietam-The Day After the Battle-by Alexander Gardner

Long considered the only known Civil War view of a battle in action, Gardner’s photograph actually shows reserve artillery east of Antietam the day after the battle. What was thought to be the smoke of guns covering the fields in the center and right distance is fog or early morning mist. 

Although more than twenty-six thousand soldiers were killed or wounded in fierce fighting, Robert E. Lee’s first invasion of the North was soundly repelled by McClellan and the Confederate general was forced back into Virginia.

Albumen silver print from glass negative-Gilman Collection, Purchase, The Horace W. Goldsmith Foundation Gift, through Joyce and Robert Menschel, 2005 Heilbrunn Timeline of Art History