This report discusses the FY2018 defense budget request and provides a summary of congressional action on the National Defense Authorization Act (NDAA) for fiscal year (FY) 2018. The annual NDAA authorizes appropriations for the Department of Defense (DOD) and defense-related nuclear energy programs of the Department of Energy and typically includes provisions affecting DOD policies or organization. Unlike an appropriations bill, the NDAA does not provide budget authority for government activities.