As the name suggests, this is a map thread for Harry Turtledove's Southern Victory series (sometimes called 'the Great War series', even though the Great War is just one trilogy within the series). Specifically, this consists of maps from before and after the Great War. Only North America can be shown with absolute accuracy - everything else is partial guesswork as Turtledove rarely mentions the rest of the world. Key/legend should be mostly obvious, but bear in mind that a paler version of one colour = occupied/territory, and an even paler shade means a puppet state of a country (e.g. Quebec and Ireland for the USA, Poland for Germany). So I'll start with North America - 1914 and 1925.