Braxton Bragg accepts command of the Army of the West. Shortly after Van Dorn gets the corp command that went to Bragg OTL.
Battle of Pea Ridge starts as historic.
Bragg elects to only send Pike’s unit down Cross Timber Hollow the disrupt the rear. The bulk of his forces attack Leetown (Price) or move along Ford Road towards Elkhorn Tavern (McCullough).
He also uses his unbrigaded troops and a couple cannon to demonstrate across Sugar Creek before dawn and keep US troops in place a little longer than OTL.
Plus he brings the ammunition train with him.
Net result: Major CSA victory with a large numer of POWs and equipment captured as Curtis is forced to retreat East down primative roads.
After effects: US troops are quickly shuffled to Missouri reducing the size of the Union army at alt Shiloh.