Out of all the countries that fought in world war ii, why was the united states the one that faced the least destruction once the war was over?

Because they where so geographically away, they where not easy to attack/invade

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.