What team's name comes from a band of armed guards and is the opposite to Kansas Jayhawks in the Border War?
Border War (Kansas–Missouri rivalry): The Border War (alternatively, Border Showdown) is the name of the rivalry between athletic teams from the University of Kansas and University of Missouri, the Kansas Jayhawks and the Missouri Tigers respectively. Missouri Tigers:  The name comes from a band of armed guards called the Fighting Tigers of Columbia who, in 1864, protected Columbia from guerrillas during the Civil War.
Missouri Tigers