1. The Transcontinental Railroad: Completed in 1869, the Transcontinental Railroad linked the East Coast with the West Coast of the United States, revolutionizing transportation and commerce. The railroad made it possible to transport goods and materials across the country quickly and inexpensively, leading to a boom in industry and trade.
2. The expansion of railroads into new territories: As railroads expanded into new territories, they opened up new markets and resources for American industries. For example, the expansion of railroads into the Midwest made it easier to transport agricultural goods like wheat and corn to markets in the East, fueling the growth of the agricultural sector. Similarly, the expansion of railroads into the West helped to support the growth of the mining industry, as it made it easier to transport ore and other resources to processing centers in other parts of the country.