Question: John D. "Colonel Jack" Henderson was a Colonel in the Border Wars of Bleeding Kansas, a series of violent political confrontations in the United States between what years?
Sentence (from "Bleeding Kansas"): Bleeding Kansas, Bloody Kansas or the Border War was a series of violent political confrontations in the United States between 1854 and 1861 involving anti-slavery "Free-Staters" and pro-slavery "Border Ruffian", or "southern" elements in Kansas.
Relevant evidence: Yes