Enlisted as a Private on 6 September 1864 at the age of 22.
Mustered in Company D, 18th Infantry Regiment New Hampshire on 14 September 1864.
Mustered out on 10 June 1865.

I found this website while looking for information on the
Delaney House (D.C.) from whence my great grandfather was
mustered at the end of the war.

My great-great uncle Pvt. Francis LaPean served in the 18th New Hampshire Infantry, Company I. The regiment brief history is taken from the NPS web site: Organized at Concord September 13, 1864. First six Companies recruited under call of July 19, 1864. Four Companies under call of December 21, 1864. Companies 'G,' 'H' and 'I' join Regiment in February, March and April, 1865. Company 'K' was on duty at Galloupe's Island, Boston Harbor, entire term, and mustered out May 6, 1865. Six Companies ordered to City Point, Va., September, 1864. Attached to Benham's Engineer Brigade to December, 1864. Clough's Provisional Brigade, Ferrero's Division, Defences of Berumda Hundred, Va., to March 1865. 3rd Brigade, 1st Division, 9th Army Corps, Army of the Potomac, to May, 1865. Garrison at Washington, D. C., till July, 1865.