The 1987 Intermediate Nuclear Forces Treaty between the United States and the Soviet Union eliminated an entire class of ground-launched missiles.
The treaty states: "...each Party shall eliminate its intermediate-range and shorter-range missiles, not have such systems thereafter, and carry out the other obligations set forth in this Treaty."
The 3M-14 land attack missile, which may be the basis of the INF Treaty-busting SSC-8. (Photo from Wikimedia Commons)
According to a report by the New York Times, Russia has operationally deployed one battalion equipped with the SSC-8 cruise missile. A 2015 Washington Free Beacon report noted that American intelligence officials assessed the missile's range as falling within the scope of weapons prohibited by the INF Treaty (any ground-launched system with a range between 300 and 3,400 miles).
The blog ArmsControlWonk has estimated the SSC-8's range to be between 2,000 and 2,500 kilometers (1,242 and 1,553 miles) based on the assumption it is a version of the SS-N-30A "Sizzler" cruise missile.
While it looks like the Russians could be holding onto some banned systems, the U.S. scrapped three systems falling under the INF Treaty.
A BGM-109G Gryphon is launched. (DOD photo)
1. The BGM-109G Gryphon cruise missile
Forget the name, this was really a ground-launched Tomahawk that was deployed by the Air Force. According to the website of the USAF Police Alumni Association, six wings of this missile were deployed to NATO in the 1980s. Designation-Systems.net noted that the BGM-109G had a range of 1,553 miles and carried a 200-kiloton W84 warhead.
Pershing missile ARTY/ORD round 32 roars skyward, T-time 815 hours at Hueco Range, Ft. Bliss, Texas. (US Army photo)
2. The MGM-31A Pershing I and MGM-31B Pershing Ia ballistic missiles
The Pershing I packed one of the biggest punches of any American nuclear delivery system and could hit targets 740 miles away. With a W50 warhead and a yield of 400 kilotons (about 20 times that of the bomb used on Nagasaki), the Pershing Ia actually was too much bang for a tactical role, according to Designation-Systems.net.
The West Germans operated 72 Pershing 1a missiles, according to a 1987 New York Times report.
The US Army launches a Pershing II battlefield support missile on a long-range flight down the Eastern Test Range at 10:06 a.m. EST on Feb. 9, 1983. This was the fourth test flight in the Pershing II engineering and development program and the third flight from Cape Canaveral. (DOD photo)
3. The MGM-31C Pershing II
According to GlobalSecurity.org, this missile had longer range (1,100 miles), and had a W85 warhead that had a yield of up to 50 kilotons. While only one-eighth as powerful as the warhead on the Pershing I and Pershing Ia, the Pershing II was quite accurate – and could ruin anyone's day.
A Soviet inspector stands beside the mangled remnants of two Pershing II missile stages. Several missiles are being destroyed in the presence of Soviet inspectors in accordance with the Intermediate-Range Nuclear Forces (INF) Treaty. (DOD photo)
According to the State Department's web site, all three of these systems were destroyed (with the exception of museum pieces) by the end of May, 1991.