Kennesaw Mountain National Battlefield Park Both attacks were brief, bloody failures. Astride Burnt Hickory Road three Union brigades totaling 5,500 men crossed swampy,heavily wooded terrain.Sheets of fire drove them under cover before reaching their objective, a mountain spur today named Pigeon Hill.Confederates on Little Kennesaw rolled huge rocks downhill at them. As soon as it became obvious that the attack would not succeed, it was recalled.