In the late 1800s, the growth of the railroad led to Midwestern cities like Minneapolis and Cleveland becoming
Cleveland was another of the Great Lakes industrial boomtowns. Founded in 1786, it grew rapidly after the Erie Canal was completed in 1825. [ Large steel mills were built using coal from the Appalachian Mountains and iron ore from Michigan and Minnesota. John D. Rockefeller founded Standard Oil Company in Cleveland in 1862, which resulted in the development of a large petrochemicals industry.
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