The main purpose of the Sharing Essential Resources for Veterans Everywhere Act, or the SERVE Act, is to enhance the availability of healthcare for veterans by improving collaboration between the Department of Defense (DoD) and the Department of Veterans Affairs (VA). The act aims to ensure that veterans have better access to medical facilities and services, particularly in areas where military treatment facilities have excess capacity. Key provisions of the act include the development of action plans by the Secretaries of Defense and Veterans Affairs.