Pawnee Killer formed a military band whom played a dominant role in what country?
Pawnee Killer: Pawnee Killer (born 1826) was a leader of the Oglala Sioux. Pawnee Killer:  He also led a band of mixed Sioux-Cheyenne Dog Soldiers during the US war against the Plains Indians. Dog Soldiers:  Beginning in the late 1830s, this society evolved into a separate, militaristic band that played a dominant role in Cheyenne resistance to the United States of America expansion towards west in Kansas, Nebraska, Colorado, and Wyoming, where the Cheyenne had settled in the early 19th century.
the United States of America