The Soviets developed the RPG-2 from the German "Panzerfaust 150". Further development led to the ubiquitous RPG-7. The RPG-7 is one of the most widely used anti-tank weapons, favored most by soldiers of irregular militaries. The RPG-7 could fire a range of different warheads, from thermobaric warheads to a single HEAT or tandem-charge HEAT warheads against explosive reactive armor equipped tanks. The RPG-7 has a long combat history, and has been used in most wars from the Vietnam war all the way to present day wars. In modern times, the RPG-7 is generally used in an urban environment, which would enhance their effectiveness due to the close ranges involved. However, the aging RPG-7 has evolved to the even more potent RPG-29 which has proven its worth in conflicts in the Middle East, damaging the Merkava IV, Challenger 2 and M1 Abrams main battle tanks.