Final answer:
John Brown wanted to launch a war against slaveholders.
Step-by-step explanation:
John Brown wanted to launch a war against slaveholders. He believed that armed insurrection was necessary to end slavery and was willing to use violence to achieve his goal. Brown's raid on Harpers Ferry in 1859 is a prominent example of his attempt to incite a slave rebellion and challenge the institution of slavery.
Learn more about John Brown's aim to launch a war against slaveholders.