What did Lincoln promise to do?
O To force southern states back into the union
To end slavery
To punish the South for breaking away
O To not allow the conflict to become a war



Answer :

Answer: The answer is "to end slavery"

Explanation:

More context would be very helpful but that seems like the most logical answer because the conflict did become a war, Lincoln didn't want to punish the South too harshly for breaking away because they might be more reluctant to join the union, and the war was already partially to keep the Southerners as part of the union.