Here's a breakdown of what it implies:
* Exceptional Performance: They consistently excelled in their tasks, often exceeding expectations.
* Dedication and Commitment: They were highly motivated and invested in their work, showing unwavering loyalty and a strong work ethic.
* Positive Impact: Their efforts had a significant and beneficial impact on their organization, team, or mission.
* Recognition and Honor: Serving with distinction is often recognized with awards, promotions, or other forms of commendation.
This phrase is commonly used in military, government, and professional contexts, but can also be used in everyday language to describe someone who has done a great job.