The DA Form 2166-9-1, commonly known as the NCO Evaluation Report for Sergeants, serves as a critical tool in the Army's performance evaluation system. This form is designed to assess the performance and potential of Non-Commissioned Officers (NCOs) and plays a pivotal role in their career progression. It captures essential administrative data such as the NCO's name, rank, unit, and the period being evaluated, ensuring that all relevant information is accurately documented. The form is divided into several parts, each focusing on different aspects of the NCO's performance. Part II emphasizes the authentication process, requiring signatures from the rater and senior rater, thereby ensuring accountability in the evaluation process. In Part III, the rated NCO's duties and responsibilities are outlined, providing context for the evaluation. The performance evaluation sections in Part IV delve into various competencies, including character, presence, intellect, leadership, development, and achievement, offering a comprehensive overview of the NCO's capabilities. Finally, Part V allows the senior rater to assess the overall potential of the NCO compared to peers, which is crucial for future assignments and promotions. Understanding this form is essential for NCOs and their evaluators alike, as it not only reflects past performance but also shapes future opportunities within the Army.