What principle allows commanders to use force only after all other options have been exhausted?

The principle that allows commanders to use force only after all other options have been exhausted is necessity. This principle emphasizes that the use of force must be a last resort, implemented only when all non-violent measures have been considered or applied without success. Commanders are expected to explore all available alternatives, such as diplomacy, negotiation, or sanctions, before resorting to military action. This approach upholds the ethical and legal obligations of military operations, particularly in reflecting the essential aim of minimizing harm and seeking peaceful resolutions whenever feasible. Adequately addressing the necessity of force ensures that military actions are justifiable and proportional to the circumstances at hand.