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Antietam Campaign Map for

9 September 1862

Lee Prepares His Next Move

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The Situation on 9 September: General McClellan pushes his Army of the Potomac further toward Lee at Frederick: his right under Burnside (I and IX Corps) to beyond Brookeville, the center under Sumner (II and XII Corps) to Middlebrooke, and his left, Franklin's VI Corps, to Darnestown. Pleasonton's Cavalry establishes a line from Poolesville at the left (south) through Clarksburg and Damascus to Ridgeville on the National Road from Baltimore, to the north and east.

General Lee's Army of Northern Virginia, screened by Stuart's Cavalry, remains in place along the Monacacy and at Frederick, but prepares to move. Lee has become concerned that the Federal garrisons at Martinsburg and Harpers Ferry, which are on his prospective supply line, have still not been evacuated as expected. He plans to split his army, sending parts of it to clear the garrisons beginning on September 10. He sends his commanders the plan in Special Orders No. 191.

Units on this Map:

[Confederate]
A. P. Hill's Light Division
Army of Northern Virginia
D. H. Hill's Division
Ewell's Division
Hampton's Brigade
Jackson's Command
Jackson's Division
Lee's Brigade
Longstreet's Command
Robertson's Brigade
Stuart's Cavalry Division
Walker's Division

[Federal]
1st Division, IV Corps
2nd Brigade, Cavalry Division
2nd Division, V Corps
Army of the Potomac
Fifth (V) Army Corps
First (I) Army Corps
Ninth (IX) Army Corps
Pleasonton's Cavalry Division
Second (II) Army Corps
Sixth (VI) Army Corps
Twelfth (XII) Army Corps

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