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the united states changed so many things from 1770 to 1870

the united states changed so many things from 1770 to 1870. the population increased drastically from 2 148 100 in 1770 to 38 558 371 in 1870. the increase in population is caused by immigration of people to the us and slavery was another cause. slavery and population had a big affect on the next 100 years of the united states history. the us also changed diversely with new innovations like roads waterways railroads steam boats and refrigerated railroad cars. a few new innovations that changed or improved from 1776 to 1870 are the roadways waterways railroads steam boats and refrigerated railroad cars. roadways were an innovation that created a way for easier and faster transportation. waterways were also a way for transportation to cut out a

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