Knocking round on CK2, particularly a mod called after the end, places you in the Americas post apocalypse with a random swirl of religions and a massive map.
Started off playing far East as you can get, did alright for myself in taking over the Kingdom e.t.c. expanded SW as it offered the path of least resistance with pagans that I could war on for whole duchies at a time. Picked up the odd county in Canada as I went.
Finally conquered the majority of New England which had been pagan, only for English armies to come from across the seas, about 10x bigger than mine.
I was basically the purple on the map + bits of the red.
They took the bottom half of the purple oh so easily, got absolutely creamed and so I figured rather than get annihilated I'd offer my fealty to them and bring them down from within, using them as a springboard later on in the game.
Slowly took back most of the land within the Empire so it's mine.
I now own 90% of the Empire
Should be easy enough to wipe them, but one issue.
My army size.
Their army size, Event spawn OP.