For what will hopefully be a running timeline, here's a wikipage for an alternate Quake that stuck more to the original RPG plans for the game. It's slightly unfinished from a page standpoint, but most of the excluded details would be based on parts of the timeline I haven't worked out yet.
Writing lore docs exhausts me and I want to get this out already. Tl;dr, Lovecraftian monsters are accidently summoned by the Battle of Verdun (bare with me), effectively ending the war in the west-along with the existence of France, oops-2 years early, the world order collapsing accordingly. I do actually have lore for more specific conflicts/border changes, I.g Indochina, I'm just too lazy to actually write it all down in a nice format, so please ask about anything you want to know about; despite the silly PoD, the rest of the lore is at least thematically appropriate, if not actually realistic.
