Quote Originally Posted by Strickland View Post
Maybe I misunderstood or misread Clausewitz, but dont COGs have to offer resistance? How does either terrain or infrastructure provide resistance?
Whether Clauswitz said that COGs have to offer resistance, I have no idea. I'm going with the definition in FM 1-02/MCRP 5-12A operational Terms and Graphics, which states:

Centers of Gravity(DOD) Those characteristics, capabilities, or sources of power from which a military force derives its freedom of action, physical strength, or will to fight. Also called COGs.

Additionally, COGs are talked about in FM 3-0, Operations:

5-27. Center of Gravity. Centers of gravity are those characteristics, capabilities, or localities from which a military force derives its freedom of action, physical strength, or will to fight. Destruction or neutralization of the enemy center of gravity is the most direct path to victory. The enemy will recognize and shield his center of gravity. Therefore, a direct approach may be costly and sometimes futile. Commanders examine many approaches, direct and indirect, to the enemy center of gravity.
5-28. The center of gravity is a vital analytical tool in the design of campaigns and major operations. Once identified, it becomes the focus of the
commander’s intent and operational design. Senior commanders describe the
center of gravity in military terms, such as objectives and missions.
5-29. Commanders not only consider the enemy center of gravity, but also
identify and protect their own center of gravity. During the Gulf War, for example, US Central Command identified the coalition itself as the friendly
center of gravity. The combatant commander took measures to protect it, including deployment of theater missile defense systems.


It was in these terms that infrastructure and terrain can be centers of gravity (think oil fields).