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Besides connecting the eastern United States with the western United States, the transcontinental railroad was also instrumental in

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taniaorozco
besides connecting the eastern united states with the western united states, the transcontinental railroad was also instrumental in bringing in immigrants from ireland and china.

hope this helps, God bless!
Topmadworld
Hey there,
The answer to your question is - bringing in immigrants from Ireland and China

Hope this helps :))

~Top♥