Thought Evans only had titular authority over the troops in Hood's division in this period.
Evans was given actual immediate command of a newly formed SC brigade of four regiments (17, 18, 22 & 23 SC) , as well as Holcombe's assigned SC Legion, that left SC to join the AoNV in Jul. '62, as an independent brigade, unattached to any division (with Evans reporting directly to Longstreet, commanding the Army's right wing). The brigade's strength was bolstered by the addition in mid-Aug. '62, of Macbeth's SC artillery that was also moved from SC to VA.
Per his official report, Maj. Gen. Evans commanded a division, called elsewhere a "provisional division," which included his own brigade and Whiting's division of two brigades, under Hood, into Sept. 17. The National Park Service history of Second Manassas describes Evans' provisional division like this...
From General Longstreet's memoir:
Longstreet describes Hood's division as a "demi-division."
Evans was not Hood's "titular" commander, evidently, but his actual one. Under General Evans, Brigadier General Hood retained command of Whiting's division (of the TX and Law's brigades). After Groveton, and prior to South Mountain, Evans had ordered Hood to turn over some captured ambulances to Stevens' brigade (his own brigade). Hood refused to do so, complaining he would only turn them over to the army at large, but not to another brigade alone. Evans placed Hood under arrest. From Hood's book:
Being under arrest, and unable to command troops in that capacity, Gen. Longstreet ordered Hood to report rearward, but General Lee ordered Hood to remain with the troops, though still under arrest.
At South Mountain General Lee asked Hood to simply apologize to his commander, that the arrest might end and he resume command of his division, but Hood refused. General Lee then ordered Hood's arrest suspended during the battle, etc., that he might take an active part.
On September 16, Evans reports Hood's division was detached from his command. During the battle the next day Col. Andersons' brigade also. From Evans official report:
There are some more modern histories that suggest Gen. Hood was "unaware" he was under Gen. Evans' command in that period. I've never seen any historical suggestion of such a case of confusion. The confusion is modern. Evans' official report, which is part of the ANV's record, is pretty clear. Evan's notes he was "ordered" to assume command of a provisional division size force, whose composition changed (in the manner reported by Evans) from the close of August through the battle of Anteitam:
Hood's official report regards his own division (or demi-division as Longstreet called it) alone, and doesn't mention Evans. However, Gen. Evans report notes that Hood's official report was passed
through him, who was his C.O. after the 29th, as he refers to it:
At Antietam, Evans's independent brigade remained unattached to any division, with Evans reporting direct to Longstreet.
Colonel P.F. Stevens of the Holcombe Legion assumed command of Evans' brigade at the close of August when Evans took charge of his "provisional division." Stevens commanded it through the Battle of Antietam. During its course, Gen. Evans also gathered up a few hundred stragglers, dividing them into two battalions he placed under field officers, which acted in conjunction with Stevens' brigade.
Col. Stevens reports the time at which Evans' provisional division authority was concluded, after the battle, when he resumed command of his own brigade, and Evans his own regiment, on the 20th of September.