Martin, their asking for boots on ground for agent orange. I would write back that your filing for Herbicides in Thailand using the VA May 2010 CP Bulletin. Now you need to prove your father worked on the flight line near the perimeter. Tough, but there is info on internet. You need to show where his work duty was. Look at the Thailand Combined Website which has a roster of Taklhi vet and where they worked. VA is looking for proof of where he worked. I used maps, base photos, and etc for my approval at Udorn for herbicides. good luck