Vync - You can search the internet for your unit. Contact the NPRC for unit rosters for when you were in. Contact the NARA in College Park, MD, for ORRL's, daily journals, etc..
The only thing know the VA will do is contact the Records Research Unit (can't recall their actual title at the moment) and have them try to verify your stressor.
You're better off trying to get evidence yourself, as it would be faster and could save you yrs. You can do the research, at the NARA, in MD, yourself.
pr