Jus ad bellum

"Jus ad Bellum" means:

1. "Right to war"

It is a set of criteria that are to be consulted before engaging in war in order to determine whether entering into war is permissible, that is, whether it is a just war.

• Sources:http://1991-new-world-order.wikia.com/wiki/The_rules_of_war, http://www.crimesofwar.org/a-z-guide/jus-ad-bellum-jus-in-bello/ and https://en.wikipedia.org/wiki/Jus_ad_bellum