I'm a little disappointed in the HOI4 modding community, because this mod probably has a richer backstory and details than any other mod, unfortunately : r/hoi4
HOI4 Modding Countries And States - YouTube
The Best Hearts of Iron IV Mods PC Editorial | GameWatcher
The 15 Best Hearts of Iron 4 Mods [2022]
Turn Hearts of Iron 4 into the best Star Wars game with this (very alpha) mod | PCGamesN