[@Elitestpotato] Excellent questions! As for New Vegas the NCR now controls Vegas strip and the Hoover Damn with the Legion nothing more the tribal's once more. Most of the factions aligned with the NCR and began to work with them at the behest of the Courier, the Brotherhood of Steel packed up and headed East, the Courier also headed East as the NCR worked to civilize the Mojave the Courier and friends headed on for new adventures.

As for Fallout 3, the Paragon of good known as the Lone Wanderer helped hundreds most importantly returned clean drinking water to the wastes and handing over to the virus to the Brotherhood of Steel. As the Brotherhood regrouped Elder Lyons preparing most of the newly united Brothers to go north his daughter and handful of others were left to protect the wastes. At this point in time there's maybe hundred or so BoS members between Virginia and South Carolina, the wanderer and courier have companions have been given sanctuary in the Citadel while both these heroes left to learn why super mutants were coming from Florida. Three Dog is back as well having headed down to South of the Border a town between North and South Carolina where he restarted GNR delivering news to the Enclave over ridden people there.