What is the best way to address military counterparts who have a friendly working relationship?

Addressing military counterparts with a friendly working relationship using their rank followed by their first name is considered appropriate as it maintains a level of professionalism while also acknowledging the established camaraderie. This approach respects the military hierarchy and demonstrates an understanding of the importance of rank in military culture. By using their rank, you show recognition of their position and accomplishments, which can enhance mutual respect. Additionally, using the first name after the rank reflects the friendly rapport you have developed, making it a balanced way to communicate.

In contrast, using just the first name diminishes the formality typically observed in military settings, which can lead to misunderstandings about rank and authority. Addressing someone by their last name only may come off as overly formal and can create a distance that is not conducive to a friendly working relationship. Using a full name could be perceived as an unnecessary formality in a context where familiarity exists, thereby missing the opportunity to strengthen the connection you already have while still honoring the military structure.