In concer did you mean concert? becuase if that is what you ment the answer is the war in Crimera just before the first world war.
ANSWER: The development of railroads in US was a major upgradation in the field of transportation. It provided quick transportation with cheap fares. The railroads would take only a few days to cover distances which were impossible during that time and would consume weeks. As the supply factor was smooth comparatively, the demands for natural resources rose up. People knew that it would not be costly for them to use those raw materials which were otherwise impossible for them to use because of the high transportation cost involved in the middle.
An economy where products, prices, and services are determined by the market, not the government.
