Question: What team's name comes from a band of armed guards and is the opposite to Kansas Jayhawks in the Border War?
Sentence (from "Border War (Kansas–Missouri rivalry)"): "Sports Illustrated" described the rivalry as the oldest (Division I) rivalry west of the Mississippi River in 2011, but it has been dormant since Missouri departed the Big 12 Conference for the Southeastern Conference on July 1, 2012.
Relevant evidence: No