How were the Southern states and border states impacted differently with the Emancipation Proclamation?

The ancient system of trade routes that ran from rome to china was known as the

Why is it useful for historians to base certain studies on the analysis of historical themes

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.