What is a primary duty of a platoon sergeant?

The primary duty of a platoon sergeant is to assist the platoon leader and manage soldier welfare. This role is crucial because the platoon sergeant acts as a bridge between the leadership and the soldiers, ensuring that the needs and concerns of the service members are addressed while also supporting the tactical and operational directives given by the platoon leader. The platoon sergeant is responsible for mentoring soldiers, helping to develop their skills, and ensuring that they are physically and mentally fit for their duties. This oversight not only fosters a positive unit morale but also enhances overall unit performance.

The other options, while important duties, do not encompass the primary responsibilities of the platoon sergeant in the way that managing soldier welfare does. Leading tactical operations directly is typically the responsibility of the platoon leader, not the platoon sergeant. Overseeing unit financials and maintaining equipment inventory are also essential tasks but they relate more to administrative and logistical functions, which are not the core focus of the platoon sergeant’s role. Hence, the emphasis on soldier welfare and supporting the platoon leader makes this choice the most accurate reflection of the platoon sergeant's primary duty.