How did mountains affect government in the ancient Greek city-states? Close community relationships led to a united government.

Isolation limited contact and prevented a united government.

Isolation led to reliance on sea travel for building the government.

Threat of invasion resulted in separate independent governments..

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.