During the Cold War, the US prepared for a conventional battlefield with fairly structured problems and relatively clear objectives.The military's assessment of future operations is one characterized by a higher degree of uncertainty than in the past; one in which the situations change quickly and which are more complex.This changing environment means that the military needs to rethink its strategies in favor of approaches which allow for greater adaptability and flexibility.

How does mechanistic and organic organizational designs apply to the ideas to the military structure of the past and the future?

Detailed and some example please.