USA HISTORY

Detailed explanation-1: -By age 30, Carnegie had amassed business interests in iron works, steamers on the Great Lakes, railroads, and oil wells. He was subsequently involved in steel production, and built the Carnegie Steel Corporation into the largest steel manufacturing company in the world.

Detailed explanation-2: -In the early 1870s, Carnegie co-founded his first steel company, near Pittsburgh. Over the next few decades, he created a steel empire, maximizing profits and minimizing inefficiencies through ownership of factories, raw materials and transportation infrastructure involved in steel making.

Detailed explanation-3: -Carnegie Steel Company was a steel-producing company primarily created by Andrew Carnegie and several close associates to manage businesses at steel mills in the Pittsburgh, Pennsylvania area in the late 19th century.

Detailed explanation-4: -One of the captains of industry of 19th century America, Andrew Carnegie helped build the formidable American steel industry, a process that turned a poor young man into the richest man in the world. Carnegie was born in Dunfermline, Scotland, in 1835.

Detailed explanation-5: -Because of his position, Carnegie had knowledge of the war machine during the Civil War and saw there was a large need for iron products. After the war he used this new knowledge to switch his business interests from railroads and telegraphs to the ironworks industry, eventually founding the Keystone Bridge Works.