The Confederacy has won the civil war via a negotiated peace, comprised of the states of Virginia (including eastern West Virginia), North Carolina, South Carolina, Georgia, Alabama, Florida, Mississippi, Louisiana, Arkansas, Texas, and "Sequoia" (Indian Territory south of the Oklahoma and Canadian Rivers). Washington DC is now a border city and the government must relocate. Where does it go? I've seen Philadelphia proposed before, and it'd have some decent historical prestige. Perhaps a territory already under federal jurisdiction? The military academies in Annapolis and West Point could perhaps be modified to serve as Federal Districts. Alternatively, there's the confluence region of the Cumberland, Wabash, and Ohio Rivers. There was a bit of a push for this OTL: Metropolis, Illinois was proposed in 1850 and Paducah, Kentucky (or the area around it) was called Capytol City for a bit IIRC with this purpose being in mind. St Louis was supposedly proposed OTL, though I cannot find a source. It's certainly in a pretty central location, not too far from the northeast by ship, could be a railroad hub, has mountainous terrain to the south via the Ozarks, etc. York, Pennsylvania was capital for a little bit OTL. It's still eastern but it's on the way to the west. It's defended by mountains but not too out of the way. Cincinnati was the first city west of the Appalachians and is on the canal, meaning it wouldn't be too far from the northeast by boat. Wheeling, West Virginia (Kanawha TTL?) is on the National Road, Ohio River, and B&O railroad as well as in territory seized from a Confederate State. Perhaps there?