The event that is most likely shown in the map in the question is the fact that Manufacturing and population centers in the 1800s were located mostly in the North.
<h3>Why was there a growth in the population of the North?</h3>
The North of the United States was known to have had an increase in the growth of factories and manufacturing.
Unlike the south that was focused mostly on agriculture, the North was known for the high rate of immigration for this purpose.
Read more on Manufacturing in the North here:
brainly.com/question/1142704
#SPJ1
