Question: The Immortal Ten were a group of free-staters that included a Kansas Territory Jayhawker who joined what during the American Civil War?
Sentence (from "The Immortal Ten"): The Immortal Ten were a group of militant Kansan abolitionists and Free-Staters who on July 23, 1859, freed John Doy from a Missouri jail, where he was being held for allegedly abducting slaves.
Relevant evidence: Yes