When I was a kid, I thought that 'yankee' was only half of a word, and being called one was good enough to start a fight in the schoolyard down here in Texas. However...
One of the common aspects of Victorian Science Fiction is an alternate history, not just an alternate technology, and one of the most popular variants of alternate histopry is one in which the American Civil War continued far longer than it did in our history, or in which the Confederate States somehow managed to prevail in Mister Lincoln's War. Which, if you have studied that conflict, is really unlikely.
In my VSF Universe, the War Between the States lasted longer than in the real history, but the South still lost. Just like in the real world, the war sparked a lot of incredible development in technology. Add that to the possibilities of VSF, and you get some interesting developments. The GASLIGHT game has some material set in an alternate Civil War (Victoria Hawkes, etc.), and there is the RPG Deadlands, where the war is still going on a decade or so later. Deadlands is an overlooked horror/VSF crossover, I think largely because of its setting in the American West. But when you can go to Mars, the West is not really that far a frontier any longer!