The terrorist attacks of September 11, 2001 fundamentally changed our security environment. The system of strategic deterrence in place since the beginning of the Cold War visibly collapsed. Now we are trying to fashion a new strategic deterrence that relies not so much on retaliation as on prevention, either stopping the terrorists outright, deterring the sponsors, or convincing them that terror cannot succeed. To help us deal with the pressing problems of the post-September 11th world, we have three ongoing technological revolutions in sensors, information technology, and weapons. These technologies can enable us to think differently about how we organize and fight. Indeed, this is what network-centric operations are about. Their true impact derives from how they are applied. Narrowly applied, they would produce more efficient attrition, yet they clearly can do much more. The concept of effects-based operations is the key to this broader role. It enables us to apply the power of the network-centric operations to the human dimension of war and to military operations across the spectrum of conflict from peace, to crisis, to war, which a new strategic deterrence demands. The broad utility of effects-based operations grows from the fact that they are focused on actions and their links to behavior, on stimulus and response, rather than on targets and damage infliction. They are applicable not only to traditional warfare, but also to military operations short of combat. Effects-based operations are coordinated sets of actions directed at shaping the behavior of friends, foes, and neutrals in peace, crisis, and war. In brief, network-centric operations are indeed a means to an end, and effects-based operations are that end.