12th Regiment, Rhode Island Infantry
United States 
U.S. Military Rhode Island Rhode Island Military Rhode Island in the Civil War 12th Regiment, Rhode Island Infantry
Brief History
The 12th Regiment, Rhode Island Infantry was organized at Providence and mustered in for nine months October 18, 1862.
It was mustered out July 29, 1863.
Companies in this Regiment with the Counties of Origin
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.
Other Sources
Books
History of the Twelfth Regiment, Rhode Island Volunteers, in the Civil War ...
ebook available online at archive.org ,
History of the Twelfth Regiment, Rhode Island Volunteers, in the Civil War, 1862-1863. Prepared by a committee of the survivors, in 1901-4. view online at Hathi Trust Digital Library
The Rebellion record: a dairy of American events edited by Frank Moore
History of the Twelfth Regiment, Rhode Island Volunteers, in the Civil War, 1862-1863 - Tillinghast, Pardon Elisha, 1836-1905 Read online at archive.org
Internet sites
mosocco.com - Rhode Island Infantry regiments
Albros in the Civil War - a list of people with the surname of Albros who served in the Civil War.
Browns in the Civil War - a list of people with the surname of Brown who served in the Civil War.
Civil War in the East - a reference guide to America's Civil War
Converse Soldiers in the Civil War - a list of people with the surname of Converse who served in the Civil War.
Higgins in Rhode Island Northern Forces during USA Civil War - a list of people with the surname of Higgins who served in the Civil War.
Matteson Family Papers - a collection relating mostly to Asahel Matteson and his family.
Mattesons in the Civil War - a list of people with the surname of Matteson (and various spellings) who served in the Civil War.
The Perrigo Genealogy - a list of people with the surname of Perrigo ( and various spellings) who served in the Civil War
Spooner Generations - a list of people with the surname of Spooner whi served in the Civil War