What role did the buffalo play in the conflict between native Americans and the united states government

The bison were exterminated due to rising of cattle culture across Great Plains and the west. With guns becoming popular in their existence the killing of buffalo became easier. Even with the native Americans who were gaining knowledge and some experience with guns. Buffalo were free range, while the government wanted control. We wanted a say over land, over every species, and eventually, through the years our government has done that.