7th Regiment, Missouri Cavalry (Union)
This regiment was organized February 20, 1862, by consolidation of Black Hawk Cavalry and Unattached Companies. Attached to Dept. of Kansas to June, 1862. District of Southwest Missouri, Dept. of Missouri, to October, 1862. 1st Brigade, 2nd Division, Army of the Frontier, Dept. of Missouri, to June, 1863. 1st Brigade, 1st Cavalry Division, District of Southeast Missouri, Dept. of Missouri, to August, 1863. 1st Brigade, 1st Cavalry Division, Arkansas Expedition, to January, 1864. 1st Brigade, 1st Cavalry Division, 7th Army Corps, Dept. of Arkansas, to May, 1864. Clayton's Independent Cavalry Brigade, 7th Army Corps, to September, 1864. 1st Brigade, Cavalry Division, 7th Army Corps, to February, 1865. 2nd Brigade, Cavalry Division, 7th Army Corps, to February, 1865. 
For more information on the history of this unit, see:
- The Civil War Archive section, 7th Regiment Cavalry, (accessed 21 July 2012).
Another source says the 7th Regiment of the Missouri Cavalry (Union) enrolled between 24 July 1861 and 6 November 1861. They were Mustered between 15 October 1861 and 31 December 1861. They were discharged between 15 September 1864 and 15 September 1865. They were led by Colonels William Bishop, Daniel J. Houston, and John F. Phillips.
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.
Cmpany A - Captain Lafayette Brawner (Bunner) - many men from Warsaw
Company B -Captains Elliott, Elijah Bradett, and Amos S. Burrows - many men from Warsaw
Company C - Major Henry P. Spellman, and Captains John W. Tappass (Toppass) and Abram C. Clark - many men from Warsaw
Company D -Captains James M. Vance, William McKee, Barton P. Hackney, Thomas W. Kinsloe - many men from Warsaw.
Company E - Captain George Rockwell - many men from Carthage, Illinois.
Company F - Captains Thomas C. Miller, James M. Wrightman - many men from Warsaw, Illinois.
Company G - Captain William A. Martin - many men from Warsaw, Illinois.
Company H - Captains Nathan A. Winters, John Johnson - many men from Kirksville, Missouri.
Company I - Captain Charles R. Coombs - many men from Macon County, Missouri.
Company K - Captain Fred C. Loring - many men fromLaclede, Missouri.
Company L - Captain Wesley R. Love - many men fromLaclede, Missouri.
Company M - Captain Benjamin T. Humphrey - many men from Laclede, Missouri.
The above information about the companies with partial rosters is found in Kenneth E. Weant's book,(Civil War Records Union Troops Missouri Volunteer Calvary)Volume 4.
- 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.