Conversation so far:
What happened at Harpers Ferry?
When the raid on Harpers Ferry took place.
Who was John Brown?
the abolitionist John Brown, an insurgent who advocated the use of violence to destroy slavery in the United States.
Was he part of the raid on Harpers Ferry?
In the autumn of 1859, as Brown and his men prepared to launch the attack.
What happened during the attack?
The raid failed.
What did they do after it failed?
Brown was convicted of treason and hanged in December.
Was Tubman involved in the raid?
When the raid on Harpers Ferry took place on October 16, Tubman was not present.
Was Tubman involved with John Brown?
Brown was joined by "General Tubman", as he called her.

Question: What relationship does this event have to Tubman's activities?
Self-contained rewrite: What relationship does the raid on Harpers Ferry have to Harriet Tubman's activities?