I saw a picture of them in Osprey "Army of the Potomac" and I loved the 'generic' look, as well as the use of both Springfield and Enfields rifles within the same company. They saw service in nearly every campaign of the Eastern Theater from '61 until '64, when their 3-years-enlistment had run out. Part of the men re-enlisted and became part of the 1st Maine Veterans, as which they saw service in '65.