Why is a 1st sgt called top?

A 1st Sergeant is often referred to as "Top" as a term of respect and endearment, reflecting their seniority and leadership role within a unit. The nickname highlights their position at the top of the enlisted ranks, serving as a key advisor to the commanding officer and responsible for the welfare and discipline of the troops. This informal title fosters camaraderie among soldiers while acknowledging the 1st Sergeant's authority and experience.