Pickett's Mill Battlefield preserves ground fought over on May 27, 1864, during the Atlanta Campaign. After weeks of maneuver and combat around New Hope Church, Major General William T. Sherman's Union armies sought a way around Confederate defenses west of Marietta. Sherman directed an attack near a rural mill owned by the Pickett family, believing the Confederate right flank might be vulnerable. Dense woods, ravines, narrow farm lanes, and limited visibility made reconnaissance difficult and disrupted the coordination of large formations.

Brigadier General Thomas J. Wood's division of the Union Fourth Corps formed the main assault force. Its brigades advanced late in the afternoon against troops of Major General Patrick Cleburne's Confederate division. Cleburne had placed his men behind improvised works and used the broken terrain to concentrate fire. Union units emerged from woods into close-range resistance, while supporting attacks failed to create a decisive breach. Repeated efforts became disorganized, and darkness approached before commanders fully understood the strength of the position.

The assault was repulsed with heavy Union losses and much smaller, though still serious, Confederate casualties. Wounded soldiers remained between the lines, and local civilians confronted the aftermath across farms and woodland. Pickett's Mill is often described as one of the Confederacy's last clear tactical victories, but it did not reverse the campaign. Sherman's forces continued maneuvering toward the railroad and Atlanta, while General Joseph E. Johnston's army withdrew from successive positions when threatened with being outflanked.

The battlefield returned to agricultural and timber use after the war. Earthworks survived under forest cover, but the engagement received less public attention than larger battles of the Atlanta Campaign. Veterans' accounts and military studies gradually clarified the routes of individual brigades. Development pressure in the expanding Atlanta region eventually made preservation urgent. State acquisition assembled hundreds of acres, protecting trenches, ravines, roads, and the mill vicinity sufficiently to preserve the relationship between terrain and tactical movement.

The historic site now uses trails, markers, a visitor center, archaeology, and landscape management to interpret the battle. Because much of the ground remains wooded and comparatively undeveloped, visitors can understand why commands fragmented and why defenders held an advantage. Preservation also allows study of soldiers' fieldworks, artifacts, burial evidence, and the civilian landscape transformed by combat. Pickett's Mill is significant not simply as a Confederate success, but as a case study in reconnaissance failure, command pressure, improvised defense, and the human cost of the relentless maneuvers that carried the war toward Atlanta.