Federal General William T. Sherman ordered General George H. Thomas to attack Pickett's Mill in 1864, in order to better the Union army's position in Georgia. The battle ended in a Confederate victory--more than 2,000 soldiers dead in the fighting. According to the park's web site. "Pickett's Mill is one of the best preserved Civil War battlefields in the nation. Visitors can travel roads used by Federal and Confederate troops, see earthworks constructed by these men, and walk through the same ravine where hundreds died." Check for reenactments here. The Visitor's Center has a film, artifacts and exhibits.