Who was responsible for promoting NCOs from the Revolutionary War to WWII?

The Regimental Commander is the correct choice for this question because historically, the promotion of Non-Commissioned Officers (NCOs) has typically fallen under the purview of higher command within the military structure. In the context of military history from the Revolutionary War to World War II, Regimental Commanders held the authority to make significant personnel decisions, including the promotion of NCOs. They had the oversight necessary to evaluate the performance and capabilities of soldiers within their regiment, thus ensuring that the right individuals were promoted to positions of increased responsibility.

The role of the Regimental Commander involves a comprehensive understanding of unit dynamics and personnel management, which is crucial when selecting leaders who would inspire and effectively manage troops on the ground. This authority reflects the importance of leadership cohesion in maintaining operational effectiveness, especially during the significant conflicts of the eras mentioned.