I'm not sure specifically which 'Vietnam beer run' true story you're referring to. It could be about soldiers getting beer during the Vietnam War in some anecdotal accounts. Maybe it was a risky or humorous adventure to obtain beer in the challenging environment of Vietnam at that time.
As I don't know the exact story, it could be that the main event was a search for the best beer in Vietnam. Maybe they visited different bars or breweries.
If we think about it, the key elements might be the type of beer. Was it a local Vietnamese beer or something imported? Also, the time period would be important. If it was during the war, there could be elements of danger and scarcity involved in the beer run. And of course, the characters who were either trying to get the beer or were affected by it in some way are also key elements.
The 'Beer Run Vietnam True Story' might involve soldiers during the Vietnam conflict. Maybe there were instances where they had to make runs to get beer, either for themselves or for their comrades. It could also be a story about civilians in Vietnam and their relationship with beer and some sort of adventure or event around getting it. However, without more information, it's all speculation.