1st Regiment, Maine Cavalry
The 1st Regiment, Maine Cavalry was organized in Augusta, Maine on October 31, 1861 for three years. The original members were mustered out on November 25, 1864 when their service was up, but later recruits, along with members of the 1st District of Columbia Cavalry and those who chose to reenlist, were retained in the regiment until its mustering out at Petersburg, Virginia on August 1, 1865. 
For more information on the history of this unit, see:
- The Civil War Archive section, 1st Regiment Cavalry, (accessed 29 May 2012).
- The Wikipedia article, 1st Maine Volunteer Cavalry Regiment, (accessed 6 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.
- Seven of the companies of the 1st Regiment, District of Columbia Cavalry, (Companies D, F, G, H, I, K and L) transferred to the 1st Regiment, Maine Cavalry, on August 27, 1864. .
- Companies raised from Aroostook, Cumberland, Franklin, Kennebec, Penobscot, Somerset, and York counties 
- Company A
- Company B
- Company C
- Company D
- Company E
- Company F
- Company G
- Company H
- Company I
- Company K
- Company L
- Company M
- 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 ‘Maine 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.
- Maine in the Civil War describes many Confederate and Union sources, specifically for Maine, 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.
- Tobie, Edward P., History of the First Maine Cavalry, 1861-1865, (Boston: First Maine Cavalry Association, 1887). Google Books; FHL book 974.1 M2t, FHL film 1425529 item 1
- Wikipedia: State of Maine, Report of the Adjutant General for the Years 1864 and 1865, Vol.I, p. 8.
- National Park Service, The Civil War Soldiers and Sailors System, (accessed November 2010).
- Draw The Sword  (accessed 30 Dec 2011)