Definition
Suppression of Enemy Air Defenses—using missiles and aircraft to neutralize or degrade enemy air defense systems so other aircraft can operate safely. Basically clearing the airspace.
Example Usage
SEAD missions preceded the main bombing campaign to eliminate surface-to-air missile threats.
Origin
Formalized as doctrine during the Vietnam War when Soviet air defense systems posed serious threats.
Fun Fact
SEAD missions rank among the most dangerous in modern air warfare, requiring specialized aircraft and tremendous skill.
Source: Military air operations and doctrine
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