Directives issued by competent authority that define circumstances and limitations for combat engagements are known as?

Rules of engagement (ROE) are critical directives issued by a competent authority that define the circumstances, conditions, and limitations under which forces engage in combat. They serve to guide military personnel in making decisions during combat operations, ensuring that actions comply with both international law and the military's operational objectives. ROEs set the framework within which military forces operate, clarifying when and how force can be employed, and helping to prevent unnecessary escalation of conflict and civilian casualties. This makes them essential for both operational effectiveness and adherence to legal and ethical standards in warfare.

The other terms, while related to military operations, do not encapsulate the specific function and legal implications of ROE. Combat rules may refer to broader strategies, while standing orders typically signify directives for routine operational procedures that are not necessarily focused on combat engagement. Engagement protocols might involve specific procedures for engagement but lack the comprehensive legal and operational framework inherent in ROE.