1st Regiment, Illinois CavalryEdit This Page
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Seven Companies, "A" to "G," organized at Alton, Illinois, and mustered in July 3, 1861. The Regiment mustered out July 14, 1862.
Companies "I," "H" and "K" were not mustered with Regiment and never served with it. These companies mustered out December 27, 1862. 
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.
Seven Companies, "A" to "G," organized at Alton, Illinois, and mustered in July 3, 1861.
Company "H" was organized at Alton, Illinois, June 12, 1861.
Company "I" organized at Alton, Illinois, July 9, 1861.
Company "K" organized at Alton, Illinois, December 9, 1861. Men often enlisted in a company recruited in the counties where they lived.
The following counties of origin are taken from the Adjutant General's Report, found on the Illinois Civil War Rosters web site.
Company B - many men from Gallatin County (Also Known as Gallatin County Cavalry) - Gallatin County web site and roster.
Company C - many men from Coles County - Coles County website and roster.
Company D - many men from Knox, Henry and Peoria counties - Knox, Henry and Peoria county web sites and roster.
Company E - many men from Montgomery County - Montgomery County web site and roster.
Company F - many men from Adams and Sangamon counties - Adams and Sangamon county websites and roster.
Company G - many men from Warren County - Warren County web site and roster.
Company H - many men from many men from Marion and Grundy counties (Also Known as Centralia Cavalry) - Marion and Grundy county web sites and roster.
Company I - many men from White County (Also Known as White County Cavalry)- White County web site and roster.
Company K - many men from Winnebago County (Also Known as Light Dragoons, Steele's Guards, Huntley's Cavalry Company) Winnebago County web site and roster.
Other Source Material
- Illinois Civil War Rosters from the Adjutant General's Report, 1st Regiment, Illinois Cavalry (accessed 10 May 2011) includes rosters of all the regiments and information on the different companies in each regiment.
- ↑ 1.0 1.1 National Park Service, The Civil War Soldiers and Sailors System, (accessed 15 January 2011).
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