Why did a cold war exist?

the soviets wanted more control in germany.
an ideological war existed.
the western countries were against the eastern countries in an imperialist race.
to stop future wars in europe.

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.