They called it the Cleveland Massacre. In 1871 John D. Rockefeller struck a secret deal with the railroads that transported his oil. By March of 1872, the 33-year-old businessman had used this and other tactics to take over 22 of the 26 refineries in Cleveland. This was the first step in his rise to industrial supremacy.

Now it's your turn. Can you "Corner the Market" by buying all your rivals' refineries?

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