Counterinsurgency: Comprehensive civilian and military efforts taken to defeat an insurgency and address any core grievances. (U.S. Joint Forces Command Draft Concept 3-24, 2009)

Distributed operations: Operations characterized by forces widely dispersed in multiple domains throughout an operational area, often beyond mutually supporting range and operating independently of one another because of distance, differing missions and capabilities, but supported by a variety of nonorganic capabilities. The critical distinction between distributed operations and joint distributed operations is the level and responsiveness of external support to the distributed units. (U.S. Joint Forces Command Draft Concept 3-24, 2009)

Foreign internal defense: Participation by civilian and military agencies of a government in any of the action programs taken by another government or other designated organization to free and protect its society from subversion, lawlessness and insurgency. (Joint Publication 1-02, 2009)

Insurgency: The organized use of subversion and violence by a group or movement that seeks to overthrow or force change of a governing authority. Insurgency can also refer to the group itself. (U.S. Joint Forces Command Draft Concept 3-24, 2009)

Irregular warfare: A violent struggle among state and non-state actors for legitimacy and influence over the relevant populations. Irregular warfare favors indirect and asymmetric approaches, though it may employ the full range of military and other capabilities, to erode an adversary’s power, influence and will. (Joint Publication 1-02, 2009)

Operational environment: A composite of the conditions, circumstances and influences that affect the employment of capabilities and bear on the decisions of the commander. In other words, the operational environment is everything, everybody and every event around you. (Joint Publication 1-02, 2009)