4th Regiment, Missouri Infantry (Union)
This regiment (also known as 4th Regiment, Volunteer Missouri Infantry) was organized at St. Louis, Missouri January 15, 1862, by consolidation of the Gasconade Battalion and the 3rd Regiment United States Reserve Corps. It mustered out February 1, 1863. 
For more information on the history of this unit, see:
- The Civil War Archive section, 4th Regiment Infantry (3 Years), (accessed 25 July 2012).
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 - Captain Adolph Knipper, Captain Charles A. Warner - enrolled in Osage City, Cole County
Company B - Captain Michael Bauer, Captain Charles C. Manwaring - enrolled in Herman, Gasconade County
Company C - Captain Constance Rick - enrolled in Herman, Gasconade County
Company D - Captain William Hirt - enrolled in St. louis, St. Louis County
Company E - Captain Balthaser Mundwiller - enrolled in Herman, Gasconade County
Company F - enrolled in St. Louis, St. Louis County
Company G - Captain Charles Denny and Captain Albert H. Piquenard - enrolled in St. Louis, St. Louis County
Company K - Captain A. H. Viguenard - enrolled in St. Louis Arsenal, St. Louis County. Many of these men were transferred to the 12th Regiment Volunteer Missouri Infantry.
The information about the companies and counties is from Kenneth E. Weant's book, Civil War Records, Missouri Volunteer Infantry, Volume 2, Three Year Volunteer Regiments 4-10, (Arlington, Texas : K.E. Weant, c2011), pages 16-28. FHL 977.8 M2wkv v. 2
- 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.
- National Park Service, The Civil War Soldiers and Sailors System (accessed 11 January 2011).