123rd Regiment, Ohio Infantry
The 123rd Regiment was organized at Monroeville, Ohio, and mustered in September 24, 1862. It had duty in the Department of Virginia until June and mustered out June 12, 1865. 
- Keyes, Charles M., ed. The Military History of the 123d Regiment of Ohio Volunteer Infantry. Sandusky, Ohio: Register Steam Press, 1874. 196 p. Google Books. FHL Collection fiche 6118273 (3 fiche).
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.
Companies by County:
Company A - had many men from Wyandot County.
Company B - had many men from Huron County.
Company C - had many men from Huron County.
Company D - had many men from Seneca County.
Company E - had many men from Huron County.
Company F - had many men from Wyandot County.
Company G - had many men from Erie County.
Company H - had many men from Crawford County.
Company I - had many men from Seneca County.
The above information is from The military history of the 123d Regiment of Ohio Volunteer Infantry, edited by Charles M. Keyes (see above).
- Beginning United States Civil War Research gives steps for finding information about a Civil War soldier. It covers the major records that should be used. Additional records are described in ‘Ohio in the Civil War’ and ‘United States Civil War, 1861 to 1865’ (see below).
- National Park Service, The Civil War Soldiers and Sailors System, is searchable by soldier's name and state. It contains basic facts about soldiers on both sides of the Civil War, a list of regiments, descriptions of significant battles, sources of the information, and suggestions for where to find additional information.
- Ohio in the Civil War describes many Confederate and Union sources, specifically for Ohio, and how to find them.. These include compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.
- United States Civil War, 1861 to 1865 describes and explains United States and Confederate States records, rather than state records, and how to find them. These include veterans’ censuses, compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.
- National Park Service, The Civil War Soldiers and Sailors System, (accessed 6 December 2010). &lt;br&gt;