Which term describes an operation conducted by two or more nations under a formal alliance, sometimes described as an Allied operation?

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

Answer: (B)

An operation carried out by two or more nations under a formal alliance is described as an Allied operation. The term Allied explicitly signals a recognized political-military binding among the participating countries, with shared planning, command, and objectives under that alliance. This makes it the most precise label for actions taken within a formal bloc like the Allies in a war.

A multinational operation is broader in spirit, simply indicating many nations are involved, but it doesn’t inherently imply a formal alliance or unified command. A coalition operation refers to a temporary, ad hoc partnership for a particular mission, which may lack the long-standing structure of an alliance. Combined operations describe coordinated actions by forces from different nations and services, focusing on joint execution, but the clear indication of an established alliance is what the term Allied operation conveys.