Irregular warfare primarily involves conflicts between which entities?

Irregular warfare primarily involves conflicts between state and non-state actors because this type of warfare is characterized by the use of unconventional tactics and strategies by various groups that are not formally recognized as traditional military forces. State actors are typically nations or governments that have centralized authority along with established military capabilities. Non-state actors include various entities such as insurgents, terrorist groups, and guerrilla fighters who are not affiliated with any government.

This context is vital since irregular warfare often occurs in situations where state authorities are challenged or undermined by non-state groups that leverage asymmetric warfare strategies to achieve their objectives. Understanding this dynamic enables military and strategic planners to better anticipate and respond to such conflicts.

The other options, while they mention forms of conflict, do not encompass the full breadth of irregular warfare. Conflicts primarily involving only state actors overlook the essence of irregular engagements characterized by their asymmetry. While local communities and governments can be involved, they don't always capture the conflict's irregular nature. Lastly, focusing solely on international organizations and countries neglects the significant role played by non-state actors in these types of conflicts.