So I was thinking about these two factions, and how they kinda got shoved aside in the games and basically ignored. For some reason. So what do we know about these factions? I've got the manual pdf, so I know about the Guild Wars, and that the KMC was basically the biggest, most demi-independent part of the Confederacy. And that Umoja apparently wanted to learn from the Protoss (and this is never a plot point?).
I've always seen the Combine as breaking apart from the Confederacy when Mengsk overthrew the latter, but there doesn't seem to be an in-game confirmation of their activities. Like, at all. There's Fenix calling them greedy in that one mission, but that never made sense to me as (1) who doesn't need resources when the Zerg are on the move? and (2) Fenix is literally attacking people who never did anything to him to help the Zerg.
So my question is, what resources are there that really get into what the KMC and UP have been doing since SC? Any novels or websites? I prefer old canon, but I wouldn't mind knowing any tidbits about SC2 era.