What effects did the westward expansion have on American Indians

It killed many of them

The American kept moving west eventually flooding into the land of Native Americans. The US government created designated reservations for the Native Americans to live on, however these reservations reflected harsh living conditions. Native Americans were used to hunting buffalo, however due to being forced to relocate, there were no buffalos to hunt in that area, therefore the government provided the Indians with supplies. Despite their effort to fight back, many of the American Indians got killed in the process as well