I would have to go with Completion of the transcontinental railroad in 1869
The Ku Klux Klan often took drastic, and violent actions towards the blacks. Making it very hard for many of them to survive in a safe manner.
I beleive it was fur trade srry if im wrong
The bubonic plage reached Europe because of poisoned rats that got into peoples food and houses that spread to entire cities all over europe and the fact that made it worse was that people through out there fecies outside. What the bubonic plague did to the population was shrink because people who got the plague diedt.
Answer: They hoped to stay out of the war.
