Connection #1 shows how Westward Expansion is linked to the Transcontinental Railroad. Westward Expansion was about the U.S. wanting to stretch its land across North America, driven by the belief in Manifest Destiny. However, moving people and goods across such large distances was hard without better transportation. The Transcontinental Railroad, completed in 1869, made this easier by allowing people, farmers, and miners to travel to the West more quickly. It also opened up new job opportunities and supported government actions like the Homestead Act, which encouraged people to settle in these areas.
At the same time, the railroad changed life for Native Americans. Many were pushed off their land due to the new settlers, and the railroad contributed to a decline in buffalo populations, which were essential to Native American life. So, the Transcontinental Railroad was both a result of people moving west and a big reason why it happened.