M*A*S*H

M*A*S*H sometimes MASH, is the title of a book, a film and a TV show about a Mobile Army Surgical Hospital in the Korean War.

The book
The book was written by Richard Hooker, based on his experiences as a surgeon in such a unit.

The film
Starring Donald Sutherland and Elliott Gould, this Robert Altman film is based on the above book.

The TV show
The TV show M*A*S*H was a spin off of the film MASH. One of its noteable qualities was that it ran for eleven years while the war only lasted three.

The fanfiction
Fanfiction often explores what could have been. Here those are romantic relationships between Hawkeye and BJ and between Hawkeye and Margaret. Often these stories are about set after the war when everyone went home.

The authors in this fandom are older than the average fanfiction writer, which results in much less Mary Sues dropping in at the 4077th.