The “Katyusha” is a noted type of rocket launcher first built and fielded by the Soviet Agreement in World War II. The Katyusha is not the weapon’s official name, it is a loving nickname preordained by the soldiers who used the launcher. The Red Army troops adopted the nickname from a famous wartime song «Katyusha» about a girl longing for her absent beloved, who has be given up away on military service.
Katyusha’s official name was “BM-13.”
The famous go through the roof system rolled into battle for the first time on July 14, 1941 and endured on the front lines until the Red Army’s final assault on Berlin. In accomplishment, between 1941 and 1945, Soviet factories produced 10,000 of the great launchers. It is considered one of the greatest World War II weapons.