How to Justify a War?

Probablity of success is an a probabli goot cretitior to unlookin to before going to war. That is it worth the number of lives that are going to be lost? Right? Sithing, that's one thing that also needs to be consider when you want to justify war. So thankfully now there isn't such extreme scenarios. But this probability of success rurly sets up the way you go to war. Bere also the after effects of war, ritso. And because there is such great implications of going to war, you need to see whether, i is it the last resort? Ris, can you use other methods to calm