Angus, there is no need to look for the information on your desk anymore as you can find it here  .  The following information supersedes what you have on your desk.  There were two Chaparral batteries in Desert Storm;
Battery D, 6th Bn, 3rd ADA, 1st Armored Division
Battery D, 5th Bn, 3rd ADA, 3rd Armored Division
Another battalion deployed (without their Chaparrals) to the 1991 Gulf War as a provisional truck battalion (3rd Bn, 2nd ADA) in the 7th Transportation Group. Â Part of this unit (Battery A) was employed as a provisional security unit in the port of Dammam.