4th Regiment, Kentucky Mounted Infantry (Union)
The Fourth Regiment of Kentucky Volunteer Infantry was organized at Camp Dick Robinson, Kentucky, under Colonel Speed S. Fry, and mustered into the United States service on the 9th day of October, 1861 and was veteranized early in Jan,1864. The 4th received praise and commendation of every General Officer under whom it served. They fought in many battles where loss was sustained. They mustered out the 17th of August, at Macon, Georgia.  The regiment was reorganized In February 1864 at Lexington, Kentucky as the 4th Regiment Kentucky Mounted Infantry.
The 4th Regiment, Kentucky Mounted Infantry organized at Camp Dick Robinson, Kentucky, October 9, 1861. The regiment was at Macon May 1. Duty at Macon and in Georgia until August. The regiment mustered out August 17, 1865.
For more information on the history of this unit, see:
- The Civil War Archive section, 4th Regiment Infantry, (accessed 29 June 2012).
- The Wikipedia article, 4th Regiment Kentucky Volunteer Infantry(accessed 29 June 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.
The records for this Regiment's Companies are from the book "Report of the Adjutant General of the State of Kentucky" Vol. 1-1861-1866. 
- Beginning United States Civil War Research gives steps for finding information about a Civil War soldier. It covers the major records that should be used. Additional records are described in ‘Kentucky 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.
- Kentucky in the Civil War describes many Confederate and Union sources, specifically for Kentucky, 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.
- Vaughter, John B. Prison life in Dixie : giving a short history of the inhuman and barbarous treatment of our soldiers by rebel authorities. (Bethesda, Maryland : University Publications of America, c1990), FHL fiche 6082392
- Kentucky. Adjutant General, Report of the Adjutant General of the State of Kentucky, Vol. 1, 1861-1866, (Frankfort, KY: Kentucky Yeoman Office, 1866), Pg.682-683. FHL US/CAN book 976.9 M2r
- Wikipedia contributors. 4th Regiment Kentucky Volunteer Infantry article. (accessed 4 February 2013).
- National Park Service, The Civil War Soldiers and Sailors System, (accessed 6 December 2010).
- O.G. Ragan, History of Lewis County, Kentucky, (Mt. Vernon, Indiana : Windmill Publications, 1990), page 364-365. Internet Archive.
- The records for this Regiment's Companies are from the book "Report of the Adjutant General of the State of Kentucky" Vol. 1-1861-1866, pg. 682-683 Printed by authority of the Legislature of Kentucky. (FHL US/ CAN 976.9 M2r)