This legislative proposal requires the Comptroller General of the United States to undertake a comprehensive assessment of the competitive impacts resulting from mergers and acquisitions among defense contractors. This assessment will cover a ten-year period preceding the bill's enactment, focusing on how these consolidations have affected the defense industrial base. The assessment must specifically evaluate several key areas. These include the effectiveness of remedies applied to past mergers in maintaining competition and sustainability, and the efficiency of information sharing between the Attorney General, Federal Trade Commission, and the Secretary of Defense during the merger review process. Furthermore, it will analyze the Department of Defense's methods for measuring the effects of vertical integration on competition, including data collection and access to information from contractors. Finally, the Comptroller General will report on the implementation of prior recommendations from various bodies aimed at improving competition among defense contractors.