68th Regiment, Enrolled Missouri Militia (Union)
The regiment was enrolled between 22 July 1862, and 20 September 1862. They were ordered into service between 22 July 1862, and 1 December 1862. The regiment was first discharged between 26 March 1863, and 1 November 1863. They were ordered again into service between 23 April 1863, and 14 July 1864. They were discharged again between 21 May 1863, and 9 September 1864. The Colonels in charge were Colonels John W. Emerson, and James Lindsey. 
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 - Captains William P. Adair and Brown - Many men from Fredericktown, Madison County
Company B - Captains William B. Connelly and Ross Jelykle - Many men from Farmington, St. Francois County
Company C - Captains Franz Dinger and Edward August Killian - Many men from Ironton, Iron County
Company D - Captain Morgan Mace - Many men from Ironton, Iron County
Company E - Captain William J. (W. J.) Ezell - Many men from Ironton, Iron County
Company F - Captains William W. (W. W.) Bunyard and Pleasant A. Hodges - Many men from Greenville, Wayne County
Company G - Captain James E. Davis - Many men from Patterson, Wayne County
Company H - Captain H. H. Finley - Many men from Fredericktown, Madison County
Company I - Captain Jasper Belken - Many men from Fredericktown, Madison County
Company L - Captain Joseph Wilson - Ironton, Iron County
The above information about the companies with partial rosters is found in Kenneth E. Weant's book, Civil War Records: Missouri Enrolled Militia Infantry Regiments, Volume 9 
- 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:Missouri Enrolled Militia Infantry Regiments, Volume 9 (Arlington, Texas : K.E. Weant, c2010), pages 64-81. FHL book 977.8 M2wka v. 9