In a formal setting, which title should not be used for military personnel?

In a formal setting, it is essential to address military personnel by their appropriate rank or title to respect their position and the military structure. Using titles such as "Corporal," "First Sergeant," or "Cadet" appropriately recognizes their rank or role within the military framework. Each of these titles signifies a specific level of responsibility and authority, and addressing individuals by their rank is a key aspect of military etiquette.

On the other hand, using "Mr." does not align with military etiquette. This title is generic and does not acknowledge the person’s rank in the military hierarchy. In formal military contexts, it is vital to respect the established titles that convey rank and hierarchy rather than employing informal or civilian titles such as "Mr." Recognizing and using the correct military title reflects the appropriate decorum and respect expected in formal military interactions.