15th Regiment, North Carolina Infantry, formerly the 5th Volunteers
Organized as the 5th Infantry Regiment Volunteers and mustered into Confederate service for 12 months at Garysburg, Northampton County, on 11 June 1861. Re-designated as the 15th Infantry Regiment on 14 November 1861. Reorganized on 2 May 1862. Companies L and M became 2nd Companies K and I, 32nd Infantry Regiment on 4 July 1862. 1st Company D traded for Company B, 49th Infantry Regiment, on 9 January 1863. It surrendered at Appomattox Court House, Virginia. The records show 16 officers and 122 men were present on April 9, 1865. 
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 - primarily from Northampton County
Company B - primarily from Union County
Company C - primarily from Cleveland County
1st Company D - primarily from Cleveland County
2nd Company D - transfers
Company F - primarily from Harnett County
Company G - primarily from Franklin County
Company H - primarily from Alamance County
Company I - primarily from Edgecombe County
Company K - primarily from Edgecombe County
Company L - primarily from Franklin County
The information about the companies comes from A Guide to Military Organizations and Installations North Carolina 1861-1865 Information about the companies and their rosters are in Manarin and Jordan, North Carolina Troops 1861-1865 A Roster. 
- 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 ‘North Carolina 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.
- North Carolina in the Civil War describes many sources, specifically for North Carolina, 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.
- John Wheeler Moore. Roster of North Carolina Troops in the War between the States. (Raleigh: Ash & Gatling, State printers, 1882). Internet Archive.
- National Park Service, The Civil War Soldiers and Sailors System (accessed 6 December 2010).
- A Guide to Military Organizations and Installations North Carolina 1861-1865, (accessed 24 March 2011)
- Manarin, Louis H., and Weymouth T. Jordan. North Carolina Troops 1861-1865 A Roster. Vol 5. Raleigh, N.C. : State Dept. of Archives and History, 1966. FHL book975.6 M2nc Vol. 5