Fields of science, field of cemetery,drugs,
it's suga, sorry I know this doesn't help I just see that you're BTS fan...
Answer:
It was extramly dangerous to travel by wagon, there was the threat of bandits, native american tribes, and Buffalo, plus added diseases and weather conditions, when the train was invented and used for civilian use after the American civil war, railways were built from the east and mid-west to the west, they were deamed more safe and it was a faster way to travel
Buddha
Vishnu
Shiva
Brahma
and 33 million others but those are the main ones