How was the culture of plain indians changed

Their culture changed drastically in the early 16th century, when European newcomers introduced them to the horse. The horse enabled them to travel much faster across greater distances which meant that they could follow and hunt buffalo more easily. Since buffalo was the main resource, not only for food but also for tents and clothing which were made from its skin, as well as for domestic objects made from its bones, this revolutionized their culture, enabling them to live more securely. By the 18th century they became full-fledged nomadic horse cultures and the horse became a central symbol of their lives. Aside from being appreciated because of the utility and the lifestyle it made possible, the horse also became a symbol of social prestige and a cultural object, referenced in stories and songs from the time.