Why did some leaders called for african americans to be allowed to fight in the civil war

Describe the most likely weather conditions at indiana / ohio boarder

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

All of the following occurred due to the invention of the railroad except