May 7, 1864. The Federal forces, under Maj. Gen. W.T. Sherman, began the campaign for Atlanta by seizing Tunnel Hill. Howard's 4th A.C., having marched from Catoosa Springs, drover Wheeler's Cav. from the R.R. tunnel S. to Mill Creek Gap. Palmer's 14th A.C., moving from Ringgold (U.S. Highway 41), supported Howard on his right and extended the Federal front to Mill Cr. Gap, where its rt. joined left of 20th A.C. in Dogwood Valley. These operations were designed to engage the Confederate forces at Dalton, while McPherson's army moved from the W. to Snake Creek Gap, 18 miles S. of Tunnel Hill.