How did the completion of the Transcontinental Railroad contribute to the settlement of the West?

Transcontinental Railroad in 1869 had a huge impact on the West. It encouraged further settlement in the West as it made travelling their cheaper and easier. It also encouraged the development of towns along the railroad, as the railroad made the west less isolated.

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four sitting presidents have been assassinated while in office but the first was abraham lincoln,

missouri compromise of 1820 which prohibited slavery