I think that another ice age occured. It allowed people to see a different continent by lowering sea level and freezing over Berin Strait.
Answer:
The Louisiana Purchase is imperative to the United States since it helped us grow over the mainland. We purchased this enormous land parcel for $15 million and multiplied the size of the US. We got the opportunity to investigate new land and work towards accomplishing Manifest Destiny, the possibility that the US ought to grow over the mainland.
<span>Una de las principales razones fue el comienzo de la era Industrial, que trajo una repentina oleada de inmigración.</span>
I'm pretty sure only 1 or maybe 2 years.
Hope this helped. Have a great day! :D
