¿Which side had a favorable outcome from the battles? Please i need help and make it fast!!!

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.

Why did the us military stop the dakota uprising ?

Which country was an ally of the united states during world war ii? germany china japan italy