1st Regiment, New Hampshire Heavy Artillery


 * Company A
 * organized as 1st Company New Hampshire Heavy Artillery
 * mustered in July 22, 1863


 * Company B
 * organized as 2nd Company New Hampshire Heavy Artillery
 * mustered in September 17, 1863


 * Company C
 * organized from September 2 to October 17, 1864


 * Company E
 * organized from September 2 to October 17, 1864


 * Company F
 * organized from September 2 to October 17, 1864


 * Company G
 * organized from September 2 to October 17, 1864


 * Company H
 * organized from September 2 to October 17, 1864


 * Company I
 * organized from September 2 to October 17, 1864


 * Company K
 * organized from September 2 to October 17, 1864


 * Company L
 * organized from September 2 to October 17, 1864


 * Company M
 * formed by assignment of 1st New Hampshire Battery, Volunteer Light Artillery, November 5, 1864, but remained detached as a Light Battery


 * Length of service: 2 years
 * Regiment mustered out June 15, 1865.
 * Recruits consolidated to 2 Companies and mustered out September 11, 1865