Fallout new Vegas your a NCR soldier who’s current mission was just to patrol Helios one your behind some sandbags just relaxing when you notice in the deep sunset what seems to be..walking power armor a man next to you examines them with the binoculars and he mumbles “it’s the brotherhood..” he runs off leaving you behind to get reinforcements seems the brotherhood is making a station exactly infront of you as he comes back running with a a lot of extra soldiers getting ready for attack