The DoD is the single largest U.S. energy consumer. About 3/4 of its total consumption consists of mobility energy -- the energy required for moving and sustaining its forces and weapons platforms for military operations. This testimony discusses DoD¿s efforts to manage and reduce its mobility energy demand, and addresses: (1) energy issues that are likely to affect DoD in the future; (2) key departmental and military service efforts to reduce demand for mobility energy; and (3) DoD¿s management approach to guide and oversee these efforts. Includes recommendations. Charts and tables.