Your uncle's date of enlistment and brief military history are compatable with the history of the 12th A/D.
The division was activated 15 Sep 42, at Camp Campbell, KY; from 6 Nov 42,trained in TN; arrived Camp Barkeley, TX, 17 Nov 43; relocated to Camp Bowie, TX, 8 Jul 43; returned to Cp. Barkeley, 16 Jul 44; departed NYNY P/E, 20 Sep 44; (probaly sailed on the U.S. THOMAS BARRY) arvd. England, 2 Oct 44; landed in France-ETO, 9 Nov 44; entered Germany, 21 Dec 44; returned NYNY P/E, 1 Dec 45; (unable to ID ship); inactivated at Cp. Kilmer, NJ, 3 Dec 45.
Rhineland Ardennes-Alsace Central Europe
Killed in Action, 616 Wounded in Action, 2,416 Died from Wounds, 109. Casualty rate, apprximately 55%.
Brief Combat Narrative:
Entered combat 7 Dec 44; days in combat, 102.
The division crossed the Rhine River at Worms, 27-28-Mar 45; it crossed the Main River at Ochensenfurt, 3 Apr 45; it fought the Battle for Wuerzberg, 4-5 Apr 45.
I am ending this narrative at this point, for the next engagement was on 11 Apr 45.
My assumption is that he was in the 12th A/D from day one.