What was a locomotive and why was the new locomotive revolutionary

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.

Acharge on imported goods is known as what kind of tax? income excise personal

What stalled germany's initial invasion into france in 1914