What if the Confederate States successfully broke off during the American Civil War? Would the citizens of the rump Union still be known as 'Americans'? Would the citizens of the CSA be known as 'Americans'? Is it likely that citizens of both USA and CSA would be known as Americans? Or would alternate terms become more prominent? Perhaps Confederates for southerners and Yankees for northerners? Would there exist new exonym and endonyms for the names of northerners and southerners? How would the wider world refer to the inhabitants of rump USA and CSA?