Which command is not part of the five combined commands?

The correct choice is "Stand by" as it is not one of the five combined commands commonly recognized in military drill and ceremony. The five primary commands typically include "At ease," "Fall in," "Dismissed," and some others that emphasize specific formations or actions for units.

"Stand by" is often used in military contexts but serves as a directive indicating readiness or a pause in action rather than a formal command for a specific maneuver or formation. Understanding the distinctions between commands is crucial in military training, as each command has specific implications for formation and movements of personnel, ensuring discipline and organization during drills.