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.
There are no answer behind the question you had sent sir/ma'am
it would violate the goal of creating a colorblind society
Early years were marked by death and disaster. A lot of people died of famine because there was no food and the land could not be cultivated, and there were also attacks by animals or diseases. A vast majority of initial settlers died and only the few survived to bring the town up with the help of locals.
