Superficially, but it (the film, especially) was intended as an allegory to Vietnam. Well, the film certainly was—the show just kept the setting and, owing to its length, offered commentary on much more than the Vietnam war. But, IIRC, the film’s director, Robert Altman, originally wanted to set it in Vietnam but the studio was skittish about such a satire set in an ongoing war.I thought M*A*S*H was about the Korean war?