Just so you know, units/ individuals that were exposed are well documented. Operation Ranch Hand and others that sprayed agent orange, agent white etc. have had all their flights, date of mission, terrain covered etc. and most importantly units in the area at the time, and in the area post spraying, well documented decades ago when this all came up and went public. The cancer that it is most associated with is lymphoma, and ironically Admiral Zumwalts (the man who OK'ed and ordered the operations), son was a brown water sailor and died from lymphoma as a result of his exposure when in country.

Settlements that I have seen since I started following this decades ago have been very specific to people that DOD records document were in the right areas at the right time, and also developed specific cancers known to be associated with dioxin. Base of tongue cancers I have not seen covered, but I am not the expert on all this. Dioxin is heavily associated with birth defects and besides in the Vietnamese population post war, there have been settlements related to that here in the US in families of Nam vets.

So if you are going to (now well past the major settlement effort time) go into this, be sure that you can document your units and dates, (they already know who was where and when) because that's what they are looking at. You should read "An army waiting to die" when you get time.

You don't say your branch of service or unit, I have some records that might help you from when I explored this, that I might be able to dig up for you, though most of what I have is related to units that I was with in the First Marine Division as a field medical corpsman. Don't know about your tour of duty, but in my 2, I served with several different units, and short time TAD to others, as well as in many different geographic areas in the I Corps near the DMZ.