I want to flesh out the 27th's history a little more. I believe the unit was not engaged at Prairie Grove because it was still unarmed. After Prairie Grove, and Hindman reorganized what was left of the Army, the 27th is also reorganized which accounts for the list of Old and New companies B and C. The (new) company B, Company D and Company F all have former members of Adam's Arkansas Infantry Regiment. What happened to old Companies B and C, and did Companies D and F just receive re-enforcement from the men from Adam's Regiment or are these also new companies as well?

Company A – Commanded by Captain Frederick T. Wood, organized on May 18, 1862, at Yellville, Marion County.
Company B (old) – Commanded by Captain Newton A. Evans, organized February 15, 1862, at Carrollton, Arkansas, Carroll County.
Company B (new) – Commanded by Captain T. A. Hartman, organized July 22, 1862, in Fulton County. This company contained many of the former members of Company F, Adams's Arkansas Infantry Regiment, which was disbanded following the Battle of Prairie Grove.
Company C (old) – Commanded by Captain Jacob O. R. Ruble, organized February 15, 1862, at Bellefonte, Carroll County.
Company C (new) – Commanded by Captain Francis Marion Gibson, organized in Izard County.
Company D – Commanded by Captain Beal Gaither, Jr, organized February 15, 1862, at Washington Barracks, Carroll County. This company contained many of the former members of Company B, Adams's Arkansas Infantry Regiment, which was disbanded following the Battle of Prairie Grove.
Company E – Commanded by Captain W. B. Flippin, organized June 18, 1862, in Marion County.
Company F – Commanded by Captain Waddy Thorpe Hunt, organized May 21, 1862, at Locust Grove, Searcy County. This unit contained many former members of the 45th Arkansas Militia Regiment. This company also contained many of the former members of Company A, Adams's Arkansas Infantry Regiment.
Company G – Commanded by Captain Robert C. Mathews, organized May 18, 1862, Mount Olive, Izard County.
Company H – Commanded by Captain Thomas Morton, organized June 28, 1862, in Izard County.
Company I – Commanded by Captain James M. Riggs, organized July 6, 1862, at Richwoods, Izard County.
Company K – Commanded by Captain J. J. Coleman, organized June 28, 1862, at Yellville Marion County.