Final answer:
John Brown became a martyr after the Harper's Ferry incident in which he and his followers attempted to seize the Federal arsenal.
Step-by-step explanation:
John Brown became a martyr after the Harper's Ferry incident in which he and his followers attempted to seize the Federal arsenal. Brown believed in armed resistance to slavery and hoped to initiate a slave rebellion. His actions were significant in escalating tensions leading up to the American Civil War.
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