Answer is A learning your enemies is a great way to learn the solution
<span />
Answer:
Slaves freed after the civil war
Explanation:
A freedman or freedwoman is a formerly enslaved person who has been released from slavery, usually by legal means. Historically, enslaved people were freed either by manumission or emancipation. A fugitive slave is a person who escaped slavery by fleeing.
One right that is denied to non citizens of the United States is the right to vote.