A personal opinion that is not based on evidence
The mountain men era ended because the beaver was almost drove to extinction in that area and because of fashion. Yes, the change of fashion caused the mountain men era to end. Afterward though many of them became a guide for that area since they had lived there for while.
Answer:
General Porfirio Díaz
Explanation:
General Porfirio Diaz ruled Mexico from 1884-1911, the Mexican Revolution was from 1910-1920