SS-20 Saber

SS-20 Saber
George Chernilevsky · Public domain · source
Name	SS-20 Saber
Caption	An SS-20 Saber during a test launch.
Type	Intermediate-range ballistic missile (IRBM)
Origin	Soviet Union
Service	1976–1991
Used by	Strategic Rocket Forces
Designer	Moscow Institute of Thermal Technology
Manufacturer	Votkinsk Machine Building Plant
Production date	1975–1987
Number	~650 launchers
Variants	SS-20 Mod 1, SS-20 Mod 2, SS-20 Mod 3
Weight	37,000 kg
Length	16.5 m
Diameter	1.8 m
Warhead	1–3 MIRV nuclear warheads
Yield	150–1,000 kt each
Engine	Two-stage solid-fuel rocket
Propellant	Solid
Vehicle range	5,000 km
Guidance	Inertial
Launch platform	Mobile transporter-erector-launcher (TEL)

SS-20 Saber. The SS-20 Saber, designated by NATO as the SS-20 and known in the Soviet Union as the RSD-10 Pioneer, was a mobile, intermediate-range ballistic missile that became a central element of Cold War nuclear tensions in the late 1970s and 1980s. Developed by the Moscow Institute of Thermal Technology under the direction of Alexander Nadiradze, it was deployed by the Strategic Rocket Forces to replace older systems like the SS-4 Sandal and SS-5 Skean. Its deployment in the Eastern Bloc significantly altered the strategic balance in Europe, directly precipitating the NATO Double-Track Decision and becoming a primary catalyst for the Intermediate-Range Nuclear Forces Treaty.

Development and design

The development of the SS-20 Saber was initiated in the early 1970s by the Moscow Institute of Thermal Technology as part of a broader Soviet effort to modernize its theater nuclear forces. The design leveraged technology from the preceding SS-16 Sinner ICBM program, incorporating a two-stage solid-propellant rocket motor for rapid launch readiness. A key innovation was its deployment on a massive MAZ-547V wheeled transporter-erector-launcher, granting it high mobility and survivability against pre-emptive strikes by forces like the United States Air Force. The missile's post-boost vehicle, or "bus," carried up to three independently targetable reentry vehicles, each equipped with a thermonuclear warhead, providing the capability to strike multiple targets across Western Europe and parts of Asia.

Operational history

The Strategic Rocket Forces began deploying the SS-20 Saber in 1976, with initial regiments becoming operational in the Belarusian Military District and the Transbaikal Military District. By the early 1980s, approximately 441 launchers were fielded at bases across the Soviet Union, including sites in the German Democratic Republic and Czechoslovakia, placing virtually all of NATO Europe within its range. The deployment triggered a major crisis, leading to the NATO Double-Track Decision in 1979, which promised arms control negotiations while authorizing the counter-deployment of Pershing II and BGM-109G Ground Launched Cruise Missile systems. The SS-20 was maintained on high alert throughout the early 1980s during periods of heightened tension, such as the Able Archer 83 exercise.

Technical specifications

The SS-20 Saber was a two-stage, solid-fueled missile measuring 16.5 meters in length and 1.8 meters in diameter, with a launch weight of 37,000 kilograms. Its inertial guidance system provided an estimated circular error probable of around 400 meters. The missile had a maximum range of 5,000 kilometers, categorizing it as an intermediate-range system under definitions later codified in the Strategic Arms Limitation Talks. It could carry either a single high-yield warhead or up to three multiple independently targetable reentry vehicles, with individual yields ranging from 150 to 1,000 kilotons. The entire system, including its MAZ-547V transporter-erector-launcher and associated support vehicles, was designed for operations from concealed forest sites and pre-surveyed launch points.

Strategic impact and arms control

The deployment of the SS-20 Saber represented a significant shift in the European nuclear balance, as its mobility, accuracy, and multiple warheads threatened NATO's nuclear deterrent and conventional defenses. This perceived advantage fueled the political movement for the Nuclear Freeze Campaign and intensified pressure on the administration of Ronald Reagan to engage in disarmament talks. The missile became the focal point of the Intermediate-Range Nuclear Forces Treaty negotiations between the United States and the Soviet Union. Signed by Mikhail Gorbachev and Reagan in 1987, the treaty mandated the complete elimination of all SS-20 missiles, their launchers, and associated support equipment, with verification conducted by inspectors from the On-Site Inspection Agency.

Variants and upgrades

Three primary variants of the SS-20 were produced. The Mod 1 (RSD-10) carried three 150-kiloton MIRVs. The Mod 2 (RSD-10A) featured an improved second stage and a single 1-megaton warhead. The final Mod 3 (RSD-10B), which entered service in 1980, extended the maximum range to 5,500 kilometers while retaining the triple MIRV configuration. An experimental launch of an SS-20 first stage was also used as part of the development program for the RT-2PM2 Topol-M ICBM. Following the ratification of the Intermediate-Range Nuclear Forces Treaty, all variants were systematically destroyed, with some airframes converted for use as civilian space launch vehicles under the name Start-1.

Category:Cold War missiles of the Soviet Union Category:Intermediate-range ballistic missiles Category:Nuclear weapons of the Soviet Union