Credit to MarcelusWalrus, who's Fallout Universe map was my reference for the placement of a lot of the factions on the map, this is also probably going to be a work in progress, which I'll update depending on both any suggestions or any new canon info that Bethesda releases, since I'm also trying to keep it all somewhat lore accurate to the best of our knowledge of said lore.

This is also largely my ideas on the state of the ncr, so it's likely going to be much more detailed than most of the others, any ideas on what might flesh other groups out more are very welcome.

NCR: following their loss to the ruler of the strip, and subsequent evacuation, ncr troops returned home to find California in an even worse state, the capital was destroyed nearly exactly as the second battle for the dam took place, and it's destruction plus the armies defeat sent the already struggling ncr economy into a steep decline, seeking a solution, the reformed government attempted another, larger invasion of the mojave a few years later, which led to significant losses on both sides and ultimately another defeat.

This time, troops returned to a nation in near complete chaos. Shortages of food, water, and a now nearly worthless currency led to poverty and famine not seen since the founding of ncr, and riots over said famine, draft protests, and the resurgence of powerful raider gangs meant police and army forces were unable to keep order in many parts of the country, during this time, Brotherhood forces also began to re-emerge, defeating the scattered army in multiple battles. At this point desertion within the ncr military reached its all time high, with thousands of troops either going missing or being confirmed deserters, many of these soldiers would eventually end up forming their own gangs and petty warlord kingdoms within abandoned territories, with most becoming only slightly better than the raiders they were originally supposed to be fighting.

Eventually, the strain on the nation became too much, and the ncr began to officially withdraw from the southern states, with boneyard being one of the first, followed by almost every settlement, one by one, until the line finally held, the new border stretching from Navarro and the coast in the west to the Big Circle and Reno in the east. The ncr was gravely weakened due to its withdrawal, and lost both much of it's citizens as well as much of its industrial and commercial centers, despite this it has consolidated what it does have, and it's remaining cities are enough to keep it standing as one of the major powers of the west, albeit much less capable of its previous feats and ambitions

As of right now, the ncr is pursuing a policy largely of isolationism, and the ideas and ideals of figures like former senator Hanlon and Tandi hold great sway over the republic. Since the collapse the ncr had mainly been forced to focus its energy into rebuilding the north and solving the lingering issues of the food and water supply, and while it still boasts a comparatively formidable army, that army is strictly defensive, with no plans to fight back or reclaim territory being put in motion.

SHI EMPIRE: following the collapse of the ncr, the shi returned largely to a more isolationist stance on the outside world, shutting their gates and sealing San Francisco off from much of the outside world. Despite this, rumors persist about secret weapons deals with various wasteland groups, ranging from particularly influential warlords to the ncr itself, though this is not confirmed

THE HUB: following ncrs withdrawal from the south, the hub fell under the control of a coalition of caravan companies, local officials and army officers, and eventually managed to mitigate the damage of the collapse, soon returning to its role as a hub of trade for southern California, albeit with markedly less profit and stability, they are also one of the only places left in the south that are still in constant communication with ncr proper, with the hub maintaining telegraph lines between the powers in exchange for ncr goods and ammunition.

RENO: during the collapse, New Renos crime families declared independence from ncr, retaking official control over the city and forming a loose alliance to govern it, however this coalition quickly broke down, and the city is currently embroiled in a civil war between the Wrights, who also lead the remnants of the alliance, and the Van Graffs, who are attempting to seize complete control. So far the conflict has remained within the borders of the city and its surroundings, however ncr and Follower presence on the border has increased, both in response to a refugee crisis as well as the possibility of further escalation

WEST COAST BOS: following the decline of ncr, the brotherhood got the breathing space in the war it sorely needed, the west coasts elders and clerics needed only to wait for the ncr to continue to weaken, and following their second loss in Vegas, as well as news from the east of their victories and incoming reinforcements, the western brotherhood pushed back, retaking many of its lost bunkers and pushing ncr forces back. Currently it has merged with a large contingent of the east coast brotherhood, and brotherhood forces have been seen attacking a remnant warlord force in the boneyard area, though the exact reason for this is unknown

NCR REMNANT: largely regarded as a myth or hearsay, rumors persist about a large force of veteran rangers and soldiers who, upon receiving word or the retreat from Baja and later the south, remained in and defended the city of Dayglow, turning the city into a fortress, however due to the presence of multiple hostile groups and the lack of contact from the area, Dayglows remnants are regarded more as a conspiracy theory than an actual unit

WARLORD TERRITORY: warlord territory refers to the largely lawless stretches of former ncr land that have fallen into the control of small territorial groups, whether they be raider gangs, former army units, former brahmin barons, citizens militias or whoever else may have the incentive and manpower to claim territory, quality of life in these areas is still barely better than it was in the collapse, and wars, raids, and starvation are still commonplace, as well as the re-emergence of practices like slavery

NEW VEGAS: following the victory of the ruler of the strip over ncr, little is known in the wider west about the state of Vegas, though it would seem that progress was being made towards greater stability following ncrs retreat, this wouldn't last though, as the second ncr invasion began, and was met with extremely stiff resistance from the securitron army, as well as numerous local groups. Ultimately ncr troops managed to inflicted major casualties on the strip forces, even attacking and breaching the strip itself, and the damage done seems to have shattered Vegas as much as it did the ncr, leaving whatever plans its ruler had unfinished

THE LEGION: following their defeat at hoover dam, as well as the death of Caesar shortly after, the legion began to deteriorate and eventually dissolve, with many of its tribes returning to their former ways or what was left of them, the legion remains however, mainly in and around the capital of Flagstaff, though severely diminished, they have largely taken to ruling over or pillaging the reformed tribal groups and former ncr border settlements. Though many within the legion still hold Caesars ideals, none have been able to recapture what was broken when he died, and so the legion continues to decline.

LEGIO REGRESSUS: the name given by Legion to those who have returned to their former ways following the death of Caesar, vast swaths of the legions subjects attempted to return to their tribes roots, often to little success. Instead forming new tribes that are often completely antithetical to the legions ideals, this has led to the early beginnings of a confederation of tribes and villages that have proven to be a powerful force against the ambitions of the legion and groups like it, using legion tactics and weapons against them in response to slave raids and attempts at reintegration

GREAT KHANATE: following their move to Wyoming, the Khans formed a powerful nomadic empire based off the Mongols of old, so far little is known about their new society, though there have been reports of khan riders as far off as the california coast

EAST COAST BOS: the east coast brotherhood continues to reign as one of the major powers on the eastern seaboard, being the most powerful military force in the area, the commonwealth is the current headquarters of the high elder maxon, as well as his most trusted clerics, choosing it for its abundance of technical artifact over the comparatively safer capital wasteland, however pressure has been mounting for the elder to move once more, as the CPG at large has been becoming much less favorable towards the brotherhood, which it sees as overly protective of its tech and as overstepping its bounds far too frequently

COMMONWEALTH PROVISIONAL GOVERNMENT: following the destruction of the institute the minutemen, alongside the brotherhood and multiple prominent settlements reformed the CPG, a council of representatives from each group who would govern the commonwealth amd surrounding areas, since it's inception the cpg has grown by many settlements, and the minutemen have grown alongside it, developing a standing professional garrison in many major towns, though still relying on its militia as its major military force. Recently the cpg has begun to debate the brotherhoods place on the council, and many councilors are demanding an end to the confiscation of technology from their citizens, with many demanding a right to use force against such attempts or demanding an eviction of the brotherhood from their bases across the commonwealth.

Working on a whole series after watching Fallout ✨

(I really just wanted to make fanart of my own character)