What happened when the senate rejected the treaty of versailles at the end of world war 1?

To keep the United States free from foreign entanglements. Basically to keep out of foreign issues that did not involve them. 

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.