Judaism
https://twitter.com/MauricePinay/status/1153764360126435329
A just war requires:
(1) just authority,
(2) a just cause, and
(3) a rightful intention.
As a last resort only the necessary amount of force may be used until the just cause is accomplished—no disproportionate force, “scorched earth,” perpetual war, or atrocities against non-combatants.
Summa Theologiae: War (Secunda Secundae Partis, Question 40)
Saint Thomas Aquinas, O.P.
1225-1274 A.D.