1st Regiment, Enrolled Missouri Militia Cavalry (Union)
The 1st Regiment, Enrolled Missouri Militia Cavalry was enrolled on 1 August 1861. They were mustered on 6 September 1861. The regiment was discharged on 1 September 1865. The Colonels in charge were Colonel Calvin A. Ellis, Colonel John J. Joslyn and Colonel John F. Ritter. 
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.
Company A - Major Henry J. Steirlin - Many men from St. Louis, St. Louis County, Missouri
Company B - Captain John Baird - Many men from Bunker Hill, Macoupin County, Illinois
Company C - Captain Miles Kehoe - Many men from Litchfield, Montgomery County, Illinois
Company D - Major Albert P. Peabody- Many men from St. Louis, St. Louis County, Missouri
Company E - Major Alexander D. Mills - Many men from St. Louis, St. Louis County, Missouri
Company F - Captain Clifford - Many men from Carrollton, Greene County, Illinois
Company G - Captain B. Lewis - Many men from Jacksonville, Morgan County, Illinois
Company H - Major Henry Townsley - Many men from St. Louis, St. Louis County, Missouri
Company I - Captain Jason M. Adams - Many men from St. Louis, St. Louis County, Missouri
Company K - Captain Nathan L. Cruinkshank - Many men from Clark County, Illinois
Company L - Captain Amos S. Burrows - Many men from Madison County, Illinois
Company M - Captain Valentine Prewitt - Many men from Madison County, Illinois
The above information about the companies with partial rosters is found in Kenneth E. Weant's book,Civil War Records: Union Troops Enrolled Missouri Militia,Volume 3.
- Beginning United States Civil War Research gives steps for finding information about a Civil War soldier or sailor. It covers the major records that should be used. Additional records are described in 'Missouri 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.
- Missouri in the Civil War describes many Confederate and Union sources, specifically for Missouri, 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.
- Kenneth E. Weant, Civil War Records: Union Troops Enrolled Missouri Militia, Volume 3 (Arlington, Texas : K.E. Weant, c2007), pages 14-38. FHL book 977.8 M2wkc v. 3