Answer: The raid on Harpers Ferry was intended to be the first stage in an elaborate plan to establish an independent stronghold of freed slaves in the mountains of Maryland and Virginia
Explanation: Harpers Ferry Raid, (October 16–18, 1859), assault by an armed band of abolitionists led by John Brown on the federal armory located at Harpers Ferry, Virginia (now in West Virginia). It was a main precipitating incident to the American Civil War. The raid on Harpers Ferry was intended to be the first stage in an elaborate plan to establish an independent stronghold of freed slaves in the mountains of Maryland and Virginia—an enterprise that had won moral and financial support from several prominent Bostonians.