To authorize the establishment at Antietam National Battlefield of a memorial to the officers and enlisted men of the Fifth, Sixth, and Ninth New Hampshire Volunteer Infantry Regiments and the First New Hampshire Light Artillery Battery who fought in the Battle of Antietam on September 17, 1862, and for other purposes.

Directs the Secretary of the Interior to authorize the establishment, at a suitable location approved by the Secretary within the boundaries of Antietam National Battlefield, Maryland, of a memorial to the officers and enlisted men of the Fifth, Sixth, and Ninth New Hampshire Volunteer Infantry Regiments and the First New Hampshire Light Artillery Battery who fought in the Battle of Antietam on September 17, 1862.