No, it is not. Berdan's Sharpshooters units, that is 1st and 2nd Regiment , were set up of volunteers coming from many Union State. They were employed as independent units but mostly attached to the Third Corps of the Army of the Potomac, especially during the Battle of Chancellorsville and Gettysburg Campaign.
The 39th Regiment Illinois Volunteer Infantry.
The address of the 24Th Virginia Volunteer Infantry Regiment is: 6919 La Marre Drive, Roanoke, VA 24019-6225
James M. Beverly has written: 'A history of the Ninety-first Regiment, Illinois Volunteer Infantry, 1862-1865'
The web address of the 150Th New York State Volunteer Infantry Regiment Historical is: 150thNewYork.org
Massachusetts; The 54th Massachusetts Volunteer Infantry Regiment
The address of the 71St Pennsylvania Volunteer Infantry Regiment 1St California is: 1011 Springside Way, Lansdale, PA 19446-4671
The address of the Twenty-Fourth Iowa Volunteer Infantry Regiment is: 2406 18Th St SW, Cedar Rapids, IA 52404-3329
The address of the 150Th New York State Volunteer Infantry Regiment Historical is: Po Box 1011, Poughkeepsie, NY 12602
The address of the Company F 14Th Regiment Ct Volunteer Infantry 1862-1865 is: 30 Bobolink Lane, Somers, CT 06071-1641
The 54th Regiment of Massachusetts was a Volunteer Infantry that showed an extended service in the American Civil War. It consisted of black soldiers.
Gettysburg
The Maine Regiment that fought at Little Round Top was the 20th Maine Volunteer Infantry.