[Kairu]

Well in Bethesda's Fallout it's unclaimed. Fallout Tactics took place in the Midwest. I think the downside to doing a new location is the lack of details. It'd have to be very detailed on where, what, who, when, how, why, all those details. Especially say a city layout. I like the cross-game idea personally :P Perhaps stick to the Capital Wasteland, several years after Broken Steel DLC. The waters are purified without the FEV contaminant and the NCR and even a small rogue/scouting party have entered the area to assess the area. The Enclave is hardly seen and been scattered. They're still in their pursuit to re-establish the "True America" while the BoS are looking to help the people. The Outcasts are still there looking for tech, spreading into the Direct DC area, fighting with the BoS. The NCR are there for the same motives as the Enclave and to unify the people for their banner. Using DC as the start to recover the original ideals of the American society. The Legion moved over as a point to try and lick it's wounds and regroup and grow again, finding unexpected resistance from everyone else.