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Appendix A A-4 JP 3-0 the organization that uses it while potentially enhancing the legitimacy of the opposing party. (3) Commanders at all levels must ensure their personnel are properly trained─including knowing and understanding ROE─and are quickly informed of any changes. Failure to understand and comply with established ROE can result in fratricide, mission failure, and/or national embarrassment. Restraint is best achieved when ROE issued at the beginning of an operation address most anticipated situations that may arise. Since the domestic law of some nations may be more restrictive concerning the use of force than permitted under coalition or allied force ROE, commanders must be aware of national restrictions imposed on force participants. k. Perseverance (1) The purpose of perseverance is to ensure the commitment necessary to attain the national strategic end state. (2) Perseverance involves preparation for measured, protracted military operations in pursuit of the national strategic end state. Some joint operations may require years to reach the termination criteria. The underlying causes of the crisis may be elusive, making it difficult to achieve decisive resolution. The patient, resolute, and persistent pursuit of national goals and objectives often is essential to success. This will frequently involve diplomatic, economic, and informational measures to supplement military efforts. l. Legitimacy (1) The purpose of legitimacy is to maintain legal and moral authority in the conduct of operations. (2) Legitimacy, which can be a decisive factor in operations, is based on the actual and perceived legality, morality, and rightness of the actions from the various perspectives of interested audiences. These audiences will include our national leadership and domestic population, governments, and civilian populations in the operational area, and nations and organizations around the world. (3) Committed forces must sustain the legitimacy of the operation and of the host government, where applicable. Security actions must be balanced with legitimacy concerns. All actions must be considered in the light of potentially competing strategic and tactical requirements, and must exhibit fairness in dealing with competing factions where appropriate. Legitimacy may depend on adherence to objectives agreed to by the international community, ensuring the action is appropriate to the situation, and fairness in dealing with various factions. Restricting the use of force, restructuring the type of forces employed, and ensuring the disciplined conduct of the forces involved may reinforce legitimacy. (4) Another aspect of this principle is the legitimacy bestowed upon a local government through the perception of the populace that it governs. Humanitarian and