Or maybe Narrow One had dessert environments Tropical and so on! So maybe they were inspired my the Mayan and Egyptian and stuff. That's what I think
or maybe its a story, we start in the 1st century because the roman. arenas were build atthat time, and end up in the 16th-17th century with the discovery of america and the spanish conquering of the mayas
Could be
its the most probable, also we are probably mercenaries, because most soldier already had guns in the 16th century