Art of my own Fallout head-canon. (https://www.furaffinity.net/view/48383313/)

2277, 36 years since Roxx set out to find the GECK for her tribe. Roxx, once the Chosen One, was now the leader of the City-State, once tribal village, of Arroyo. Her place as their savior cemented her spot as their leader. Whether she wanted it or not, it was her duty, her responsibility to her people. She'd saved them once from the Enclave, but now she had to hold back the tide of the New California Republic, a once great ally, now brutal opponent amassing on her southern border. The stress caught up to Roxx again, she rubbed her cybernetic eyes, something she'd bought from the Brotherhood of Steel long ago. She thought back about how she got into this position, how it all led up to this point.

The wasteland made life difficult, raiders, monsters, and dehydration all made the infinite desert nearly unlivable. The New California Republic brought hope for the survivors after the war, their order brought promise of a stable life and real civilization under the unforgiving sun. In Roxx's quest to save Arroyo, she'd gained a good relationship with the then president Tandi, who in a small way helped her find the GECK. Roxx had hope for the young nation state, and her actions throughout the wasteland brought them from prosperity to expansion. They annexed Vault City, New Reno, Redding, San Francisco, and everything in between. They rapidly expanded in every direction, and now sat on the border of Roxx's territory, Arroyo.

Roxx stood in the chamber, addressing the diplomats and the elders. It felt wrong to have to negotiate her way out of things, when only a lifetime ago she'd wiped out entire slaver companies with not much more than a spear, some grenades, and a woman's intuition. Not that her grey hair and aging demeanor damaged her looks irreparably, but her adversaries had little interest in anything other than direct regional power. The expectation of high society, "civilization", made everything so slow, so formal; though the stakes were no lower. Direct conflict with a territory covering nearly the entire west coast was out of the question, her people would be eradicated; like so many of the other tribes who'd failed to uplift themselves in time before the NCR came to collect their taxes or conscripts in the name of further expansion. The world was shrinking, and like the old world, superpowers were consolidating any state or group weaker than them into their numbers, by force if necessary. All talks of coordination with the Republic's adversaries had fallen apart long ago. The Brotherhood of Steel, Caesar's Legion, and even the 80's all went silent eventually. It's difficult for messengers to make it through hostile lands, even harder in warzones. Spies were the only option now, and even then the war machine was too vast and decentralized to make any real puncture in the beast.

So for now, diplomacy it was. Diplomacy it would be. Roxx worked to make Arroyo indispensable in trade, but appear fierce enough to hurt the NCR badly if attacked. The people of Arroyo were made to cast aside their tribal ways, replace their culture with one of old modern America. The survivors of Vault 13 were made to fit in as well, and cast aside their own vault suits. They dropped their spears, wore sleeves over their tribal scars or tattoos, and picked up suits and brief cases. They had to not only look 'civilized', but behave in this way to prevent Arroyo from being overrun. Caps were introduced, and the hunter-gatherer lifestyle was replaced with one of commerce and production. On the military front, scouts were sent to locate nuclear weapons or other WMD's. Power Armor was being refurbished, even by Roxx herself if need be, and every nearby airfield or military base were scraped to the bottom for tanks, planes, or anything else that could serve as a weapon. The NCR's caps and gold aided Arroyo's defense preparations, all the while being used to turn around and increase their trade and production capacity. Statecraft was difficult, extremely monotonous, Roxx preferred war, she was free in chaos. But that time was over, now she was bound by the chains of civilization.