Which LOAC principle requires that only actions necessary to achieve a legitimate military objective be used?

Which LOAC principle requires that only actions necessary to achieve a legitimate military objective be used?

• A. Military necessity
• B. Distinction
• C. Proportionality
• D. Discrimination

Answer: (A)

Military necessity is the standard that actions in armed conflict must be needed to achieve a legitimate military objective and not otherwise prohibited. It allows you to use force or methods only to the extent that they directly contribute to defeating the enemy or disabling their military capability, and you should not employ measures that fail to advance a valid objective. In practice, this concept is balanced by other LOAC rules: you choose the least harmful, most direct means to achieve the objective and ensure the action complies with proportionality (not causing excessive civilian harm in relation to the military goal) and distinction (targeting military objectives while protecting civilians). For example, destroying a bridge used for enemy logistics may be lawful if it is necessary to interrupt the threat and the expected civilian impact is not excessive; targeting a hospital would generally fail the test because it does not contribute to a military objective. The idea is not to justify any action, but to authorize only what is needed to achieve a legitimate military aim.

Military necessity is the standard that actions in armed conflict must be needed to achieve a legitimate military objective and not otherwise prohibited. It allows you to use force or methods only to the extent that they directly contribute to defeating the enemy or disabling their military capability, and you should not employ measures that fail to advance a valid objective. In practice, this concept is balanced by other LOAC rules: you choose the least harmful, most direct means to achieve the objective and ensure the action complies with proportionality (not causing excessive civilian harm in relation to the military goal) and distinction (targeting military objectives while protecting civilians). For example, destroying a bridge used for enemy logistics may be lawful if it is necessary to interrupt the threat and the expected civilian impact is not excessive; targeting a hospital would generally fail the test because it does not contribute to a military objective. The idea is not to justify any action, but to authorize only what is needed to achieve a legitimate military aim.