150th Regiment, Illinois Infantry (1 year, 1865)
The 150th Regiment, Illinois Infantry (1 year, 1865) was organized at Camp Butler, Illinois, and mustered in for 1 year's service February 14, 1865. It mustered out January 16, 1866. 
Companies in this Regiment with County 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.
- Civil War Soldiers and Sailors System, (accessed 30 Dec. 2010) can be searched by soldier's name or by regiment; includes regimental rosters and additional history of the regiment.
- National Park Service, The Civil War Soldiers and Sailors System (accessed 4 January 2011).