Re. “The forces of General Cooper have been reorganized and partly clothed. General McIntosh is up the Arkansas, about 20 miles above this, with his regiment and 200 Osages.”
I am quite certain this means Broke Arm's Osage Battalion, which had been organized in the fall of 1862 - it is first listed in Cooper's Indian Brigade on September 30, 1862. Apparently the Confederate (Arkansas) Osages spent the winter in the Creek Nation, I believe I have seen references to that occurring subsequent winters also, but I am unable to point to a source at this moment.