The Long Mars
The Armstrong's survivors
Back in the 2040's in Happy Landings, the 'Napoleons' offered their leadership to the community's elders but got rejected. They attempted a coup d'état but their reign didn't last long thanks to the USS Neil A. Armstrong I.
The elders then requested Captain Stringer to bring the 'Napoleons' aboard as prisoners to exile them in a remote Long Earth from where they wouldn't be able to come back from.
Aboard the ship, they manage to seduce most of the crew to the point where a fight occured between them and the rest led by Captain Stringer.
They eventually won and took control of the ship and dumped everyone else oustide the ship (even their followers) except Sam Allen who was hidden in the Armstrong's envelope at the moment.
It was Sam Allen who provoked the crash of the ship on Earth West 182,674,101 where he lived for several years as a prisoner until he was found by Snowy.