Discuss how moral/legal thinking about war, especially “just war” evolve from Ancient times through the Middle Ages?

Discuss how moral/legal thinking about war, especially “just war” evolve from Ancient times through the Middle Ages?
The source Required is Reichberg, Gregory M., Henrik Syse, Endre Begby, eds. The Ethics of War: Classic and Contemporary Readings. Malden, MA: Blackwell, 2006.Walzer, Michael. Just and Unjust Wars: A Moral Argument with Historical Illustrations. 5th ed. NY:Basic, 2015.
How did moral/legal thinking about war, especially “just war” evolve from Ancient times through the Middle Ages? How does that relate to Walzer’s book? Use Reichberg chapters 1-3, 5, 7, and 16.Walzer, ch. 1,3..You must write three 900-word (minimum; 1500 word maximum) papers, not including notes and bibliography.7 You must quote the philosophers, not just the editors!Papers must be double-spaced.You are expected to identify, rank, and discuss the most important ideas and facts in all the readings since the last paper.Your first paragraph should contain the most important ideas of the readings.You must cite your sources and provide a bibliography.