Robin Williams's portrayal of Adrian Cronauer has led to confusion as to the beliefs of the real Cronauer. Cronauer has said that the film is about 45 percent accurate, according to a biography on Robin Williams. Cronauer has said that the film misrepresented him to make him seem anti-war, when he was, in his own words, "anti-stupidity". In fact, today Cronauer - who is now a lawyer - remains an active Republican and was a vice-chairman of the 2004 Bush-Cheney re-election campaign. Furthermore, Cronauer has also said that if he'd done half the things Williams did in the film, he would've been court-martialed and sent to Fort Leavenworth.
In order to give the trailers a more military feel, scenes of Cronauer on the air in military fatigues were shot specifically for the trailers.
Contrary to the character in the movie, the real Adrian Cronauer did not use comedy in his radio broadcast, nor was he kicked out of the military. He left Vietnam because his tour of duty was over.
As Adrian chases Tuan through the alley, the background music is actually a cut from Alex North's unused score for 2001: A Space Odyssey (1968).
The script went through a number of revisions after it was originally drafted by Adrian Cronauer in 1979. Cronauer first pitched it as a TV series, then a Movie-of-the-Week. It was the latter treatment that landed in the lap of Robin Williams, who realized the DJ role would be the perfect outlet for his brand of comedy. The original treatment by Cronauer was completely re-tooled for Williams.
This movie was filmed in Thailand, not Vietnam. On the back cover of early copies of the film, street signs can be seen in Thai.
The soldiers in the transport trucks that Adrian Cronauer entertains are from the U.S. Army's famed 1st Infantry Division. You can tell by their distinctive "Big Red One" shoulder patches.