Peacekeeping Mission to Mars

I was thinking about Leigh Brackett's Mars today (as I often do) and reflecting on how it isn't very science fictional at all, so that if you advanced the timeline of its colonial Mars about half a century to a century, you might get something that looks a bit like our modern world except with spaceships where Terran peacekeeping forces get bogged down in insurgencies or civil wars on Mars (or Venus).

With a set up like this, you could do the pulp Mars version of modern films set in conflict zones like Blackhawk Down or even better Three Kings. If you went with Earth in a sort of Cold War, you could even wind out with a Twilight:2000 sort of situation would troops lost on Mars and trying to figure out what to do next.