The 40-Day Wasteland War.
This was not the conventional war of the NCR against the Legion from Fallout.
Nor the ideologically driven conquest of stations between the Reds and the Reich from Metro.
This was two massive group of survivors, already beginning to barely eke out a living, throwing everyhing they have in terms of manpower and equipment at each other for a month straight, and then the Victor taking absolutely everything that is salvegable from the dead piles.
It's just so gnarly and realistic.