The RPG-1 is a Soviet anti-tank rocket launcher, the first in a long-lasting family. It was introduced in 1941 thanks to the efforts of Korolev's Reactive Propulsion Lab at Semipalatinsk-21, and at the time, it had no equal. Battlefield experience against these weapons led the Germans to develop the Panzerfaust anti-tank system. The RPG-1's PG-1 HEAT grenade can penetrate up to 140mm of RHA steel, but its range is limited to more or less 50m. As the Soviets upgraded their arsenal to the more effective RPG-2, many obsolete RPG-1s were distributed across the world to wage wars of national liberation against the West.