Map Map of the battlefield of Antietam. This map shows the position of each of the forty-two different commands of the regular army engaged in the battle of Antietam, September 17, 1862. Battery "G", 2d U.S. Artillery, Lt. J. H. Butler, commanding, was not engaged in the battle, being attached to Gen'l. Couch's Division, near Harper's Ferry Copy 1

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