On the east side of Intrenchment Creek, just above the bridge, stood a grist mill operated by William Cobb, a DeKalb County pioneer. The mill was a notable landmark in the movement of Confederate forces to the field of the Battle of Atlanta, fought July 22, 1864. Hardee’s Corps, Confederate States, consisting of four divisions, made a fifteen-mile night march from Atlanta, via McDonough and Fayetteville roads, to gain the rear of McPherson’s Army of the Tennessee in east Atlanta. Hardee’s troops reached Cobb’s Mill at dawn, where a halt was made to procure guides. Wheeler’s cavalry, Confederate States, rode with the column, en route to Decatur to seize McPherson’s wagon trains.