National Defense Strategy

The list is a departure from last year's, which did not list challenges specific to the climate or environment.

Officials want to implement the plan across the total Army for fiscal 2022.

"Spacepower" is a new 64-page publication explaining how the Space Force fits into U.S. national security.

For too long, the DoD has used the strategic objectives of deterrence and influence to justify "presence" missions.

Senators voiced concern that the Pentagon's new defense strategy could hurt the counterterrorism mission in Afghanistan.

The defense secretary lauds America's relationship with its allies as he accepted an award Wednesday night.