Which term best describes the command authority over subordinates by virtue of rank?

The term that best describes the command authority over subordinates by virtue of rank is "Command." In a military context, command refers to the authority that a leader has over subordinates due to their position and rank within the chain of command. This authority is inherent in the structure of military organizations, where rank and position dictate the scope of a leader's responsibilities and their ability to direct the actions of others.

Command not only involves giving orders but also encompasses the responsibilities associated with leadership, including accountability and decision-making. This authority enables leaders to achieve organizational goals, ensure discipline, and maintain order.

While discipline relates to maintaining order and ensuring adherence to regulations, and supervision focuses on overseeing the activities of subordinates to ensure tasks are completed correctly, neither of these terms captures the direct relationship of authority derived from rank. Leadership, on the other hand, involves influencing and guiding others, which may occur regardless of rank. Therefore, command is the most appropriate term in this context.