Answer:
This question is not asking for the student to make a moral judgement about war, but rather, to discuss vengeance from a Biblical perspective.
Deuteronomy 32:35-36 and Hebrews 10:30 teach that vengeance belongs to the Lord, not us. He will judge wrongs in His own time. We are to show love to our brothers and fellow man, and forgive (Ephesians 4:32) them as God has forgiven us