I'm having troubles on my grandfather's brothers WD-AGO discharge papers says he was discharged with the above unit 499th AAA Gun BN. I have been told that this unit was disbanded in 1943. Was told by St. Louis that I should take the unit on the discharge and move backwards to find out what unit he transferred from prior to being discharge. This would then have shown up within the morning report for the actual unit he served with and not some unit that had been disbanded two years earlier. Really could use some direction here on how I can find out his war unit and not some random unit they put down on his discharge papers.