The blueprint for success, he said, is the National Defense Strategy, a comprehensive document assembled by former Defense Secretary James Mattis that reshapes the military to address new threats from near-peer competitors while also continuing to prosecute the war on terror and ensuring national security.

https://www.af.mil/News/Article-Display/Article/1964782/esper-emphasizes-need-for-military-to-adapt-to-confront-new-threats-resurgent-g/ Charles Pope