The main purpose of this legislation is to require the Secretary of Defense to create a strategy aimed at improving how the Department of Defense responds to environmental contamination caused by perfluoroalkyl substances (PFAS) and polyfluoroalkyl substances. These chemicals are often found in firefighting foam and other military-related activities, and they pose risks to human health and the environment. Key provisions of the legislation include a requirement for the Secretary of Defense to submit a detailed strategy within 180 days of the law being enacted.