Which award can be earned for exemplary behaviour over a period?

The Good Conduct Medal is awarded to enlisted personnel in recognition of exemplary behavior, efficiency, and fidelity over a specified period of service. This award reflects the individual's adherence to military regulations and standards, showcasing their commitment to duty and discipline in their role. The medal is typically awarded after three years of continuous active service and requires that the individual have no disciplinary actions or significant negative performance ratings during that time. This makes it a prestigious recognition of sustained good conduct within the military community.

In contrast, the other awards mentioned serve different purposes. The Service Medal recognizes participation in specific campaigns or operations; the Presidents Hundred Tab honors marksmanship; and the Sapper Tab recognizes a soldier's proficiency as a combat engineer. Each of these honors focuses on particular skills or achievements rather than a broad assessment of overall behavior over time.