Who were the leaders in the railroad industry during the 1800s? (example: who got rich from the railroad industry? )

The major Industry leaders were Andrew Carnegie who was the king of steel, John D. Rockefeller who monopolized the oil industry, Cornelius Vanderbilt who was the most powerful railroad tycoon, and he built the Transcontinental Railroad and JP Morgan. All of these men were very rich.

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.