| Term | Definition |
| balance of power | the theory that national survival in an anarchic world is most likely when military power is distributed to prevent a single hegemon or bloc from dominating the state system |
| alliance | a formal agreement among sovereign states for the purpose of coordinating their behavior to increase mutual security |
| balancer | an influential global or regional state that throws it support in decisive fashion to the weaker side of the balance of power |
| bandwagoning | the strategy of seeking national security by aligning with the strongest state, irrespective of its ideology or form of government |
| arms race | an action-reaction process in which rival states rapidly increase their military capabilities in response to one another |
| hegemonic stability theory | the argument that a single dominant state is neccesary to enforce international cooperation, maintain international rules and regimes, and keep the peace |
| concert | a cooperative agreement among great powers to jointy manage international relations |
| arms control | bilateral or multilateral agreements to contain arms build ups by setting limits and types of weapons that states are permitted. |
| disarmament | agreements to reduce or eliminate weapons or other means of attack |
| extended deterrence | the use of military threats by a great power to deter an attack on its allies |