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Antietam Campaign Map for

13 September 1862

Federals Close in Pursuit of the ANV

Battlefield Map: click on a unit for more information about it

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The Situation on 13 September: Early on the 13th Confederate cavalry commander Stuart pulls the brigades of Hampton and Munford west to the line of Catoctin ("Kittoctan") Mountain at Hagan's Gap on the National Road and at Jefferson, respectively. He plans only to delay the approaching Federal Cavalry, but by the end of the day he is pushed back by brigade-strength Federal infantry to the South Mountain gaps.

The three Confederate columns approaching Harpers Ferry nearly close the ring on this Saturday: McLaws pursuing the Federal defenders south along Maryland Heights, Walker approaching the Loudoun Heights from the south, and Jackson nearly completing the encirclement from the west. Longstreet's command remains in the vicinity of Hagerstown, and DH Hill's Division deploys in an arc centered on the village of Boonsboro. In response to a call from Stuart, howver, he detaches Colquitt's Brigade to Turner's Gap late in the afternoon.

Late in the evening, alarmed by the rapidity with which McClellan's Army of the Potomac is appearing near Crampton's and Turner's gaps, General Lee orders Longstreet's command (less the trains, reserve artillery, and Toomb's Brigade) to march for Boonsboro next morning. He also directs DH Hill personally to Turner's Gap, and warns McLaws of the threat on his flank and rear.

During this day, the the right and center wings of the Union Army of the Potomac (I, II, XII Army Corps, Sykes regular division) consolidate and enter Frederick . The left (VI Corps, Couch's Division) advance north and west to cover the Army's flank.

The Federal Cavalry, supported by IX Corps infantry, push up the National Road and, by day's end, drive the Confederate cavalry through Middletown to the base of Turner's Gap. Other of Pleasonton's brigades approach Crampton's Gap, and skirmish with Stuart's rearguard there.

Also on this day, McClellan has handed to him the orders of his opponent, and a clear picture of General Lee's plans to clear Harpers Ferry.

Units on this Map:

1st Brigade, 3rd Division, 9th Corps
1st Brigade, Cavalry Division
1st Division, 4th Corps
1st Division, 5th Corps
2nd Brigade, 3rd Division, 9th Corps
2nd Brigade, Cavalry Division
2nd Division, 5th Corps
3rd Brigade, Cavalry Division
3rd Division, 5th Corps
4th Brigade, Cavalry Division
Army of the Potomac
Cavalry Division
First Army Corps
Ninth Army Corps
Second Army Corps
Sixth Army Corps
Twelfth Army Corps

A. P. Hill's Light Division
Anderson's Division
Army of Northern Virginia
Colquitt's Brigade
D. H. Hill's Division
Ewell's Division
Hampton's Brigade
Jackson's Command
Jackson's Division
Jeff Davis (MS) Legion (Cavalry)
Lee's Brigade
Longstreet's Command
McLaws' Division
Robertson's (Munford's) Brigade
Stuart's Cavalry Division
Walker's Division

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