The movie had Robert Duval as Frank Burns, if I remember correctly...
I wasn’t a fan of the series, as it seemed a not-too-thinly veiled slap at the Vietnam war, instead of Korea where it was supposed to be set.
That was a big problem with the film, it was too anachronistic, and everything clearly looked like it was then-present day Vietnam.
It’s too bad Sally Kellerman didn’t do the role on tv of “Hot Lips.” She was far better than the annoying and insipid Loretta Swit.