Well It is sad to see that Swiss took that all down, I can't say I agree with it but I understand why. After so many tries and so many mishaps its not surprising to see why he would be discouraged, but doesn't mean it's not worth trying again. Swiss had sent me a PM about not giving everyone the map and to keep it locked away, but even though it was his server at the time I am not going to do that.
This is your map everyone, this is your server, and as long as you all keep demanding it then I'll be here to keep it running. So with that being said I am back, ready to set up the server, install the map, and get us back up and running in no time.
See you soon Wastelanders, and keep your guns ready.
1
Supply lines would be a bit tricky though, so the NCR here has its work cut out for them!
But yeah, to only answer your question, the New California Republic is one of the largest factions in the Fallout Universe known at this time. That is why they are here. The NCR in Utah is most likely an advance unit sent from The Hub, or Nevada, after securing Nevada in the last game, though this universe obviously isn't canon so that might not apply.
Utah is Legion territory though (I think), so the NCR might have some difficulty.