; and (B) does not include sources in connection with the training, moving, and sustaining of the Armed Forces and weapons platforms for military operations and training, including tactical power systems and generators at non-enduring locations of the Department of Defense. (6) Renewable energy source The term renewable energy source has the meaning given that term in section 2924(6) of title 10, United States Code. (7) United States The term United States means the several States, the District of Columbia, and any territory or possession of the United States. 3. Net zero energy by non-operational sources of the Department of Defense (a) In general The Department of Defense shall achieve aggregate net zero energy in use of energy by non-operational sources by not later than December 31, 2029. (b) Strategy (1) In general Not later than one year after the date of the enactment of this Act, the Secretary of Defense shall submit to Congress a report setting forth the strategy of the Department of Defense to achieve the requirement under subsection (a). (2) Elements The report required by paragraph (1) shall set forth the following: (A) The strategy of the Department of Defense to achieve the requirement under subsection (a) for all installations under the jurisdiction of the Department (other than the military departments). (B) The strategy of each military department to achieve the requirement under subsection (a) for all installations under the jurisdiction of such department. (C) An assessment of the manner in which the achievement by the Department of Defense of the requirement under subsection (a) will enhance the readiness of the Armed Forces to address threats posed by Russia, China, Iran, North Korea, and violent extremism. (3) Biennial update Not later than two years after the submittal of the report required by paragraph (1), and every two years thereafter through December 31, 2029, the Secretary shall submit to Congress a report setting forth the following: (A) A current assessment of the progress of the