I have some info about soviet uniform/weapons/tactics in Afganistan. Please refer, if you need so. But storyline and characters still needed (if it going to be a campaign), because good campaign starts from the good story about Regular Guy and the Big War.
From this position I can see two possibilities:
1. Work hard to create a real-looking characters and storyline (especially from mudzhaheds side)
2. Receive another version of Rambo III movie.