If there was one thing that Fallout 3 did right, it was to portray the sense that there was a genuine conflict occurring in the wastes, disparate to the PC's involvement, and this perpetual war was taking place constantly, regardless of where or what you were doing. For example, the Mall and central DC areas are full of talon Mercs battling Mutants, the sub urbs consist of BOS, Outcasts and Raiders battling one another, and throughout the entire wasteland these factions are constantly fighting each other, trying to achieve their objective. However, despite the premise, and constant build up of the talk of battle between the NCR and the Legion, after about three extensive playthroughs, i've seen maybe four none scripted battles between said forces, and this is while actively roaming the areas id excpect to see such battles. On the rare occasion I witnessed such things, it was merely an extremely small skirmish between patrols. What about Novac? We are led to belive there is a constant threat, snipers are on gaurd, a full force could overwhelm the city at any time...But no, I haven't seen a legionary within three miles of it. It's quite hard to buy into this idea of callosal all out war, when the largest conflicts consist of patrols firing at each other from behind rocks once every blue moon... The most disappointing thing may have been Hoover dam, I mean really? The battle was literally, running across the Dam? What about the first battle wherein hundreds died, and Boulder city was blown to bits, why is this battle, supposedly involving hundreds, if not thousands of them, set on a linear shooting gallery corridor? The engine can support around thirty on screen models before frame rate dips, the ending for independent New Vegas shows us Obsidian could, and have, utilised limited AI to have exceeding amounts of characetrs on a screen at a time without frame rate drop, so why then couldn't the battle have been spread over a much larger area, have involved more troops, and say, presented a vista of battle between distant mindless troops for effect? I found the war to be very anticlimaxing in short.