What effect did the persian wars have on the role of athens in the greek world?

Why was hawaii so important to the united states & why did japan bomb pearl harbor?

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

Before the civil war, the constitution protected slavery -true -false