Atlanta, Georgia (Vicinity). Federal Pickets Before the City (U.S. Civil War) This photograph captures a significant moment during the American Civil War, specifically the federal picket lines surrounding Atlanta, Georgia in 1864. The image provides a glimpse into the military strategy employed by the Union forces under General William Tecumseh Sherman, who was attempting to capture the strategically important city from Confederate control. The picket lines functioned as a defensive barrier, maintaining vigilance against potential Confederate attacks while allowing for continuous observation of enemy movements. This photograph offers historical insight into the military maneuvers and tension that characterized the Atlanta Campaign, a critical phase in the U.S. Civil War.