Which term refers to an arrangement between two or more nations for common actions?

• A. Coalition Operations
• B. Allied Operation
• C. Multinational Operation
• D. Combined Operations

Answer: (B)

Working concept: when nations formalize cooperation to act together, the relationship is defined as being allied, and the actions taken by those partners are described as Allied operations. An Allied operation explicitly signals that multiple nations with an existing agreement or alliance are coordinating to achieve shared objectives.

Why this fits best: an arrangement between two or more nations for common actions is best captured by the idea of allies operating together. The term Allied operation conveys that the participating countries have agreed to cooperate and execute a coordinated mission, reflecting the binding nature of an alliance.

Why the other terms are less precise in this sense: a coalition operation describes a temporary, often ad hoc grouping formed for a specific objective, which isn’t necessarily rooted in a longstanding alliance. A multinational operation highlights multiple nations under a joint command but doesn’t inherently imply an established alliance. Combined operations emphasize joint actions across forces (and may involve different services or nations) rather than the existence of a formal alliance between nations.