First, railroads allowed people to travel west and have a connection to the east. This allowed the expansion of the nation to be easier and more profitable, since people in the west could trade and sell to the east. The railroad also created many jobs for men looking for work and created a traveling brothel of women who would follow the men working on the railroad. Second, the railroad made mass production and consumption possible since large quantities of raw materials could be transported to factories and distributed products.4. What critical factors led to the conquest of Native American tribes and their forced relocation to reservations? • After the Civil War, Americans began to look west for opportunities to make money, such as gold in California. The government began giving people the land they had “acquired” from the Native Americans. Technically, Native Americans never sold their land to the government because they had no concept of ownership; they believed that no one could own nature. As conflict began between the Native Americans and the Americans, the Americans stood no chance against the superior weaponry of the Americans and the decimation of the population..