When the Europeans moved westward, they killed many buffalo. Document #4 specifies on many of the things that Natives used from buffaloes. The buffalo hides were used to cover tepees. The fur was used to keep them warm. And the meat of the buffalo was used for food. As buffalo dwindled, the Native Americans grew hungrier and colder. Railroad had a big effect in the west. Document #1 and #3 specify on some impacts of railroads. Document