The main purpose of the proposed legislation, known as the "Restoring Merit in the Military Act," is to ensure that all military personnel decisions within the Department of Defense are made based solely on individual merit and performance. The bill aims to eliminate any consideration of race, ethnicity, or national origin in these decisions, promoting equal opportunity and racial neutrality. Key provisions of the legislation include a strict requirement that all actions related to military personnel, such as hiring, promotions, assignments, and training, must be based exclusively on merit.