This, the old Sandtown Road was the route of McPherson´s Army of the Tennessee [US], south to the Mitchell house, July 5, 1864.
From Mitchell´s, an old road ran east to the Chattahoochee River at Turner´s Ferry, most of its course being U.S. Highway 78. South of Mitchell´s, the E. fork (State Highway 139) leads to Howell´s Ferry; the W. fork to Baker´s & Sandtown Ferries.
From Mitchell´s, McPherson sent detachments to these crossings to threaten the left & rear of Johnston´s forces [CS] at the RIVER LINE.
033-66 GEORGIA HISTORICAL COMMISSION 1954
Plaque courtesy Lat34North.com.
Original page, with additional info, here.
Photo credit: Byron Hooks of Lat34North.com.