Market Garden

I'd start by Googling Operation Market Garden. That should link you to a plethora of sites, on which you keep clicking until you get to 'regimental roll-call, paratroopers' or something very similar. Of course if you know the actual name or number of the Colonel's regiment, it would make it easier -- just type it in.

If you click here, you will be taken to a page which lists the Allied order of battle for that operation. The First Allied Airborne Army is at the top of their list. It would help if you could narrow it down to American or British, since we don't know which you mean.