/ˌɒpəˈreɪʃənl zoʊn/ – Phrase
Definition: khu vực tác chiến.
A more thorough explanation: An operational zone refers to a specific geographical area designated for the conduct of military operations or other organized activities, typically under the control or jurisdiction of a particular military unit, organization, or authority.
Example: The company’s operational zone includes all properties within a five-mile radius of its headquarters.