The shaded areas of the map are land that the US government granted to railroad companies.

What was one reason the United States government gave subsidies and land grants to railroad companies in the 1800s?

One reason the United States government gave subsidies and land grants to railroad companies in the 1800s was to promote westward expansion and encourage settlement of the frontier. By providing funding and land to railroad companies, the government hoped to stimulate economic growth, facilitate transportation and communication, and increase access to resources in the newly acquired western territories.