For the issues of strong specialization, semantic duality, and unfavorable cross-domain communication of combat capabilities description, an ontology enhanced UML technique for graphical description of combat capabilities is presented. The application of ontology theory to create a conceptual model of combat capabilities is made more readable by the definition of a standard for UML-style graphical descriptions of ontologies. The specification is used to create a combat capability metamodel that eliminates semantic duality and unifies the top-level semantics of articulating combat capability ideas across all domains. In order to establish the combat capability description language, twelve viewpoints from the capability, combat and information perspectives were defined in conjunction with the needs of the combat capability domain description. The combat capability description language is built using the UML Profile technology. The example demonstrates how the model for defining combat capabilities takes into consideration the benefits of ontology formalization and precision as well as UML standards and communication ease.