In general, slavery in the deep South was more brutal and inhumane than slavery in the Chespeake region, and the crops being harvested were more lucrative for the farmers. During this time period slavery was divided many into the South, which cause divisions with the North leading up to the Civil War.
I am pretty sure it is tobacco
I think it only happened about three times, once in 1876 , the second time in the year of 1888, and the third I don't rememeber
The likely effect of such trail lines that were left by pioneers migrating to the west were that people who moved there afterrwards were able to derive information regarding where it was relatively safe and where territory has been charted and mapped before. This enabled a little certainty in areas of great danger.
The Nazi were the group that was not targeted because they called themselves " Nationalsozialisten" ("National Socialists").