Answer: Railroad companies
Explanation: Railroad is of major importance to America right from the 18th century when Americans observed the growth of the Rail systems in the United Kingdom, Massachusetts was the first state to start making a tangible impact in the railroad projects in 1829. During the tenures of Abraham Lincoln the former president of the United States of America he started a railroad project which was completely about 4years after his death. The main aim of investing in the Railroad companies giving huge some of money and land was to encourage settlement on the Western part of the country and bind the Union together.