All modern states must assume that potential adversaries have studied the allied use of space-based resources in the Gulf War and the war on terrorism, and will seek to counter these military information resources by any means necessary. The allies could -- and, some would argue, already do -- face a symmetric threat to space resources from the global proliferation of space-based ISR, communications and navigation systems. The allies might also face a range of asymmetric attacks on space-related resources: physical and electronic attacks on space resources, lines of communication or ground segments; denial of services through electronic jamming; or deception by camouflage, spoofing or decoys. The space-based segments of military information assets are particularly vulnerable to attack by a range of weapons, including space-to-space and earth-to-space anti-satellite weapons. For example, a nuclear detonation in space and the subsequent ionization of Earth's Van Allen belts would devastate space-based military and civil resources, and greatly diminish the value of their replenishment for months or years thereafter.

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Deblois, Bruce M. "The Advent of Space Weapons." Astropolitics. Vol. 1, No. 1 (Summer 2003). [ 15 quotes ]