"McRaven's thesis, which would become part of the curriculum at the Naval Postgraduate School, set out the core concept of special ops: that a small, well-trained force can deliver a decisive blow against a much larger, well-defended one. He defined such a mission as one "conducted by forces specially trained, equipped, and supported for a specific target whose destruction, elimination, or rescue (in the case of hostages), is a political or military imperative." Refining the key elements to success for such missions, he prescribed, in a nutshell, "A simple plan, carefully concealed, repeatedly and realistically rehearsed, and executed with surprise, speed, and purpose."