Final answer:
The insignia of the Sergeant Major of the Army features three chevrons and three arcs with a star encircled by a laurel wreath, denoting the highest enlisted rank in the U.S Army.
Step-by-step explanation:
The insignia for the Sergeant Major of the Army represents the highest enlisted rank in the United States Army. Traditionally, this insignia features three chevrons above three arcs or rockers with a star in the middle. The star at the top of the insignia is encircled by a laurel wreath, signifying the immense responsibility and seniority associated with this particular rank. The presence of the laurel wreath distinguishes the Sergeant Major of the Army from other sergeant major ranks. This position holds a place of great respect within the military hierarchy, serving as a senior enlisted advisor to the Chief of Staff of the Army.