It could work, like have the Khans get into trouble with the 80's after moving out of the Mojave. Once the 80's are conquered, the Khans would proceed to tame the lands of Wyoming with the bikes that they would get from the 80's.
Then some of the Followers would reconnect with the Khans and create a new community. Using ancient knowledge of governance, economics, and transportation they would carve an empire Northwest just like that one Khan ending.
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Will there be enough Dakka?