The S-75 gave the Soviet Union a deployable missile defense against high-flying aircraft.
The S-75 Dvina, known to NATO as SA-2 Guideline, was developed in the 1950s to defend cities and strategic sites from high-altitude bombers and reconnaissance aircraft. It offered a more deployable alternative to the huge fixed S-25 system around Moscow. The missile's arrival changed the balance between manned overflight and ground-based air defense.
A large booster, command guidance, and radar support defined the classic SA-2 battery.
A typical S-75 site used launch rails, Fan Song guidance radar, acquisition radars, and liquid-fueled missiles with solid boosters. The system was not a simple mobile launcher; it required a prepared battery layout and supporting equipment. Its technical demands were significant, but its altitude reach and warhead made it dangerous to aircraft that lacked warning or countermeasures.
The S-75 became famous for downing high-profile aircraft and shaping air-defense tactics.
The S-75 is associated with the 1960 U-2 shootdown over the Soviet Union and with extensive combat use in Vietnam and the Middle East. Its spread forced air forces to adopt electronic warfare, suppression of enemy air defenses, low-altitude penetration, and standoff weapons. Few SAMs had a larger impact on Cold War air operations.
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