About this poem:

The arrival of vast waves of white settlers in the 1800s, and their conflict with the Native American residents of the prairies, spelled the end for the buffalo.
There were even buffalo killing contests. In one, a Kansan set a record by killing 120 bison in just 40 minutes. “Buffalo” Bill Cody, hired to slaughter the animals, killed more than 4,000 buffalo in just two years.
Some U.S. government officials even promoted the destruction of the bison herds as a way to defeat their Native American enemies, who were resisting the takeover of their lands by white settlers. One Congressman, James Throckmorton of Texas, believed that “it would be a great step forward in the civilization of the Indians and the preservation of peace on the border if there was not a buffalo in existence.” Soon, military commanders were ordering their troops to kill buffalo — not for food, but to deny Native Americans their own source of food. One general believed that buffalo hunters “did more to defeat the Indian nations in a few years than soldiers did in 50.” By 1880, the slaughter was almost over. Where millions of buffalo once roamed, only a few thousand animals remained.