This report responds to the Strom Thurmond National Defense Authorization Act for Fiscal Year 1999 (H. Rpt. 105-736, Sec 247: Chemical Warfare Defense, Public Law 105-261, 17 October 1998, p. 39 and p. 591), and provides our review of the policies and doctrines of the Department of Defense (DoD) on chemical warfare defense. Based on this review, DoD recommends no modifications to policies and doctrine to achieve the objectives set forth in the public law. This report also provides a plan to establish a research program for determining the effects of chronic and low-dose exposures to chemical warfare agents, as requested. Two reviews indicate that an extensive number of doctrinal publications and policies addressing operationally significant concentrations of chemical warfare agents for temporary and short-term exposures and that current operational guidance and doctrine focuses on temporary exposures, with some short-term exposure scenarios addressed.