John D. Rockefeller did everything by his own. Vertical integrations means that he employed his own workers, then he constructed barrels to store oil and rent wagons and horses to transport that barrels. So it's called vertical integration.
John D. Rockefeller vertically integrated his monopoly in 1882 by creating a trust that controlled oil wells, refineries, and distribution networks.
John D. Rockefeller organized the Standard Oil Company of Ohio In 1870, which produced its own tank cars, pipelines, and wooden barrel.
John Davison Rockefeller Sr. was an American business magnate and philanthropist, widely regarded to as the wealthiest American of all time, as well as the richest person in modern history.
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