The Native Americans lost their land and had to live on small reservations. The population of buffalo declined rapidly. Many lives were lost due to war and weather condition.
Step-by-step explanation:
During 19th-century, many settlers moved into American West. The westward expansion happened due to population growth and motive to expand America from coast to coast. The westward expansion had a negative impact in the United States. Manifest Destiny played a role in westward expansion. This hurts natives, as many of them were killed for their land.
Many lives were lost due to war and weather. The expansion of United States from coast to coast became a reality. But Native Americans lost their land and had to live on small reservations. The population of buffalo declined rapidly.