The Pershing-II (USA) and SS-20 (USSR) missiles are two of more than 2,600 nuclear missiles banned by the Intermediate-range Nuclear Forces (INF) Treaty. The Pershing II Weapon System was a solid-fueled two-stage ballistic missile designed and built by Martin Marietta to replace the Pershing 1a Field Artillery Missile System as the United States Army's primary nuclear-capable theater-level weapon. The Pershing systems were eliminated after the ratification of the Intermediate-Range Nuclear Forces Treaty on 27 May 1988. The W-85 warheads used in the Pershing II missiles were removed, modified, and reused in B61 gravity bombs.
The SS-20 (NATO Name) Soviet Missiles called The RSD-10 Pioneer by the USSR were intermediate-range ballistic missiles with a nuclear warhead. The missile was the first Soviet missile equipped with solid fuel instead of liquid fuel, which meant that it could be launched once the order had been given instead of requiring hours doing the dangerous work of pumping the missile with liquid fuel. Its deployment was a major cause of the NATO's 'Double-Track Decision', along with the Pershing II , which led to the deployment of more medium-range nuclear weapons in Western Europe. The RSD-10 was banned from service under the 1987 Intermediate-Range Nuclear Forces Treaty. On the left in this photo we see the SS-20 while the Pershing II sits on its right.