15th Vermont Infantry The 15th Regiment , Vermont Volunteer Infantry ( or 15th VVI ) was a nine months ' infantry regiment in the Union Army during the American Civil War . It served in the eastern theater , predominantly in the Defenses of Washington , from October 1862 to August 1863 . It was a member of the 2nd Vermont Brigade . History . The 15th Vermont Infantry , a nine months regiment , raised as a result of President Lincoln ' s call on August 4 , 1862 , for additional troops due to the disastrous results of the Peninsula Campaign . It was composed of volunteers from Caledonia , Orleans , Orange and Windsor counties , as follows : Colonel Redfield Proctor , previously of the 3rd and 5th Vermont regiments , was selected to command the regiment . He would later serve as Governor of Vermont . William W . Grout , the regiment ' s lieutenant colonel , would later serve in the U . S . Congress . The regiment went into camp at Brattleboro on October 8 , 1862 , occupying barracks just vacated the day before by the 12th Vermont Infantry , and was mustered into United States service on October 22 . It left Vermont on October 23 , and arrived in Washington , D . C . on October 26 ; the next day it joined the 14th Vermont Infantry and some Maine regiments in Camp Chase , in Arlington , Virginia , then returned to camp on East Capitol Hill , and on October 30 became part of the 2nd Vermont Brigade . The regiment marched to Munson ' s Hill on October 30 , and Hunting Creek the next day , where it stayed until November 26 . It performed picket duty at Occoquan Creek from November 26 , to December 4 , when it moved to " Camp Vermont " until December 12 . It engaged in further picket duty near Fairfax Courthouse until December 20 , then moved to Fairfax Station until March 24 . From March 24 to May 7 it was at Union Mills , followed by nearly two weeks at Bealeton . It returned to Union Mills until mid - June , then for ten days elements of the regiment were stations at Bristoe Station , Catlett ' s Station and Manassas . On June 25 , the brigade was assigned as the 3rd Brigade , 3rd Division , I Corps , and ordered to form the rear guard of the Army of the Potomac as it marched north after Robert E . Lee ' s Army of Northern Virginia . The 15th marched with the brigade from Wolf Run Shoals on June 25 , crossed the Potomac River on June 27 , at Edward ' s Ferry , and moved north through Frederick and Creagerstown , Maryland . It was drawing near Gettysburg on July 1 , when the 12th and 15th regiments were detached to guard the corps trains . The two regiments accompanied the corps trains to Rock Creek Church , near the battlefield . After the battle , regiment participated in the pursuit of Lee ' s Army of Northern Virginia across the Catoctin mountains to Middletown , Maryland , then back over South Mountain , through Boonsboro , to Williamsport by July 14 . The regiment marched to Harper ' s Ferry , across South Mountain again , and camped near Petersville , near Berlin ( present - day Brunswick ) . On July 18 , the regiment was released , taking a train from Berlin to Baltimore . It reached New York City on July 20 , spent two uneventful days there during the Draft riots , then continued on to Brattleboro , where it mustered out on August 5 . Like the other regiments in the 2nd Vermont Brigade , dozens of newly discharged members from the 15th regiment enlisted again , predominantly in the regiments of the 1st Vermont Brigade , and the 17th Vermont Infantry .