The ascendancy of the offensive over the defensive stems particularly from the ability of advanced weapon systems to penetrate enemy defenses. The combination of great speed and great altitude, taken together with numbers during a mass launch, ensures that selected targets will be reached. Improvements clearly possible through the use of decoys, multiple warheads, electronic countermeasures, varying trajectories, maneuverability, feinting, and omnidirectional attack will further increase the ability penetrate defenses.