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Galleria fotografica di un lanciarazzi BM-31 12 Katyusha, Katyusha multiple rocket launchers are a type of rocket artillery first built and fielded by the Soviet Union in World War II. Multiple rocket launchers such as these deliver a devastating amount of explosives to a target area more quickly than conventional artillery, but with lower accuracy and requiring a longer time to reload. They are fragile compared to artillery guns, but are inexpensive and easy to produce. Katyushas of World War II, the first self-propelled artillery mass-produced by the Soviet Union, were usually mounted on trucks. This mobility gave the Katyusha (and other self-propelled artillery) another advantage: being able to deliver a large blow all at once, and then move before being located and attacked with counter-battery fire. Katyusha weapons of World War II included the BM-13 lanciatore, BM-8 leggero e pesante BM-31. Oggi, il soprannome è applicato anche ai più nuovi lanciarazzi sovietici montati su camion , in particolare il comune BM-21, e ai derivati.

fonte: Wikipedia