Sally Mann's "Battlefields, Antietam #11 (Smoke)" is a gelatin silver print from her acclaimed series documenting American Civil War battlefields, printed in 2002 and finished with a distinctive matte varnish containing diatomaceous earth that creates a textured, weathered surface. The photograph captures the haunting landscape of Antietam, site of the deadliest single day in American military history, with Mann's characteristic exploration of time, memory, and the relationship between photography and decay. The custom varnish coating enhances the print's ethereal, ghostly quality while physically embodying themes of deterioration and the passage of time that animate the entire series.