Bear with me, I feel a little bit of writing coming on.
Ohio. In an America that was as American as can be, Ohio in the 1950s was an indrustrial juggernaut of the country. Second only to Michigan in terms of manufacturing output, Ohioans in the urbanized areas of the state enjoyed the idealized high standard of living that typified the World of Tomorrow. It was probably a shock to most Ohioans when the United States restructured itself in the early 2000s into 13 more autonomous states, and the hard-working, true blue Ohioans were put together with the more southernly states of Kentucky and Tennessee. Although most decisions in the last century of politics in the United States made little sense to those at the time or who are today fortunate enough to be able to read about it, the Commonwealth Ohio was pitted in was bound to have repercussions down the road.
Come the Great War of 2077, Ohio was a target for many of the nukes launched on the 23rd. While its neighboring steel rival Pittsburgh was spared any direct hits, Cleveland, along with the other big cities of Ohio; Cincinnati, Columbus, Dayton, and Toledo, were struck and subsequently devastated. The resulting fallout poisoned the many rivers of Ohio; the Cuyahoga, Miami, Tuscaroras. Adding in the heavy pollution wrought by Ohio's prized industries, and for some decades after what little uncontaminated water sources were still left were the only spots of human life that could be found. Groups of nomads quickly developed, and legends of the Browns, Bengals, and Bluejacket tribes quickly developed as they struck into neighboring regions for better provisions.
Eventually, intense sources of radiation faded, and those first erstwhile tribes and other survivalist groups began to consolidate. In the pre-war era Ohio had always been able to present a united front to other states, acting as the most 'American state' of America. The truth was much more fragmented, and it showed in the societies that developed post-war. Settlement patterns of Ohio in the 1800s had led to three distinct areas of the state; New Englanders in the North, Pennsylvanian/New Jersey Quakers and neighbors in the middle, and Virginians and Kentuckians in the South. Ohio's inclusion into a Commonwealth with Kentucky and Tennessee had served as a catalyst to a revival of these sectional differences.
Three distinct groups arose by thr mid 2100s, centering around the ruins of Cleveland, Columbus, and Cinncinnati. The Kingdom of Cleve, a feudal-based society stretching along the banks of Lake Erie, and ruled by a King and a motley group of nobles, was one of the first states to arise, but very sporadically. It's origins lie almost right after the Great War, when a group of families who had survived in a private nuclear shelter raided the nearby Ravenna Arsenal, a WWII-era bunker. There they found a storage vault of Power Armor, and used those and the various weapons they uncovered there to defend their established land. Eventually, survivors and local tribes came to them for protection, and the Power Armor-clad families allowed them to live on and near their lands in exchange for part of whatever they could eke out on the devastated landscape. As time went, the Power Armor and Weapons became more and more precious to the families, symbols of their heraldry and status, although the means to manufacture and repair them was a lost art. As the Kingdom's population grew, manufacturing of simple tools and goods resurfaced, and the Cleveland area began to be known for industry once more.
The Republic of Columbus, centered around its namesake, took a different path. The seat of the old Ohio State Government, those survivors who settled around the area, led by the fabled Bluejackets, came to emulate the politics of the old, and banded together with any tribe that would agree. A chaotic but functioning sort of democracy rose out of the area, and the Republic of Columbus declared itself a successor to the American politics of old, working tirelessly toward rebuilding society to what it was before the Great War. Given Columbus' central location in the state, it acts as the go-betweens for all the local powers in the area, and its stance towards them all is only as expect able as what day it is. That said, The Republic has done a good job building itself back up, and though it lacks the heavy industry of the Kingdom of Cleveland or the nearby Pitt, it produces the majority of foodstuffs for the area. As such, its population dwarfs most nearby states.
Cinncin (or, Sinnsin as people from Cleve write it) was also founded like the Kingdom by a few select families, but instead of using the Knight of Europe for inspiration, the families of Cinncin took to a lifestyle much more akin to the Southern Aristocracy of the prebellum American south. Given its situation right on the Ohio river, which after the Great War and the loss of most mechanized forms of transportation became the prime way of transporting anything of importance, Cinncin became a commercial hub to the area. The first tribes of the area after the war took particular pride in their enslavement processes, and after those most important tribes became "more sophisticated", the focus on slavery stuck. A slave that has ended up in The Pitt has over a 50% chance to have spent time in the Cinncin barrows that line their shore. During much of its statehood however, Cinncin's principal efforts have directed it towards the former areas of Kentucky, and away from the rest of Ohio.
As of the late 2200s, there is uneasy peace between the major states of Ohio.