Rachel Parker Plummer was the cousin of a dominant figure in the Red River War who clashed repeatedly with what Colonel? 
Rachel Plummer: Rachel Parker Plummer (1818–1839) was the daughter of James W. Parker and the cousin of Quanah Parker, last free-roaming chief of the Comanches. Quanah Parker:  Following the apprehension of several Kiowa chiefs in 1871, Quanah emerged as a dominant figure in the Red River War, clashing repeatedly with Colonel Ranald S. Mackenzie.
i don't know