Since World War II, states have privileged space activity as an instrument of power. Relying on long-term programs, generally simultaneous with a nuclear endeavor, space effort may multiply strength and force, and involves considerable effects in armaments. It also allows the management of international crises, armed conflicts and even wars. United States, USSR, European countries (mainly, France), medium powers and developing countries, have deployed their space realizations in various directions. And, if space power has promoted increasing co-operations, it has always been included in political relations of force, as military and civil branches are more and more linked and interdependent. – Summary AFRI-2002