Which LOAC principle prohibits unnecessary suffering?

• A. Distinction
• B. Prohibition on unnecessary suffering
• C. Proportionality
• D. Military necessity

Answer: (B)

The principle being tested is a humanitarian limit on how war is waged: methods and means of combat may not cause more harm or suffering than is necessary to achieve a legitimate military objective. This prohibition on unnecessary suffering serves as a guardrail to prevent weapons or tactics that inflict superfluous injury, even when the objective is pursued.

In practice, this means choosing weapons and methods that accomplish the military goal without imposing needless suffering beyond what is required. While other LOAC principles also guide conduct—distinction requires targeting only military forces, proportionality checks that the force used is not excessive for the objective, and military necessity justifies actions that are essential to achieve a legitimate aim—none specifically name the idea of forbidding unnecessary suffering as a standalone constraint.