Into the heart of Dixie
Gunslinger Lizbeth Rose lives in what used to be the United States, but after the assassination of FDR in the 1930s Texas and Oklahoma have become a small land of their own known as Texoma. Other parts of the US have been ceded back to Britain (the northeast), Canada (the upper midwest), and the far west the last Tsar to escape Russia. And the rest of the south (not Texas and Oklahoma) is known as Dixie and has reverted to a post-Civil War, reconstruction society in which race relations are very, very bad.