40th Regiment, Tennessee Infantry (Walker's) (5th Confederate Infantry)
The 40th Regiment, Tennessee Infantry (Walker's) (5th Confederate Infantry) was organized at Memphis, Tennessee, in October, 1861. During February, 1862, it became the 5th (Walker's) Confederate Infantry Regiment. 
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 Hiram H. Higgins, Charels W. Raisler - "The Confederate Bricks." Enrolled at at Athens, Alabama.
- Company B - Captain Francis A. Ragsdale - A Kentucky Company.
- Company C - Captains Charles C. Henderson, Duncan McMillarn, John W. Walker - "The Morton Confederates." A Florida company.
- Company D - Captains James W. bush, Joseph A. Daniel - An Arkansas company.
- Company E - Captains G.W. Whitfield, Porter Bibb, Jr., Smith C. Twitty - "Alabama Hickorys." Enrolled at Mooresville, Alabama.
- Company F - Captain Samuel McClain - An Arkansas company
- Company G - Captain John Aaron
- Company H - Captains John A. Minter, Isaac T. Law - An Alabama company.
- Company I - Captain William E. Stewart - An Arkansas company.
- Company K - Captains Aaron G. Hammack, Thomas H. Withers - An Alabama company. 
- 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 'Tennessee 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.
- Tennessee in the Civil War describes many Confederate and Union sources, specifically for Tennessee, 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.
- Bogle, Joseph. Historical sketches of Barton's (later Stovall's) Georgia Brigade, Army of the Tennessee, C.S.A : with complete roster of the 40th, 41st, 42nd, 43rd and 52nd regiments. (Dayton, Ohio : Morningside House, c1984), FHL book 973 M2bog
- Edward G. Gerdes, 40th Tennessee Infantry Regt., (accessed 30 Dec 2011). Links to rosters for Company D, F, G and I.
- The Thirty-sixth, Thirty-ninth and Fortieth Tennessee Regiments, a brief sketch, (accessed 29 Dec 2011).
- Tennesseans in the Civil War, 40th Tennessee Infantry Regiment, (accessed 30 Dec 2011). A brief history, officers and captains of companies listed.