Department of Defense authorization for appropriations for fiscal year 2021 and the Future Years Defense Program : hearing before the Committee on Armed Services, United States Senate, One Hundred Sixteenth Congress, second session, on S. 4049, to authorize appropriations for fiscal year 2021 for military activities of the Department of Defense and for military construction, to prescribe military personnel strengths for such fiscal years, and for other purposes. (S. hrg., 2024)