What role did the Soviet army's Katyusha rocket launcher play in World War II?

Katyusha is perhaps the most favorite name of the Russian people, the famous song Katyusha is the Soviet Union and even the Russian people's favorite patriotic song, and the Katyusha rocket launcher is the Soviet Union's most famous artillery during the Second World War. Particularly in World War II, the Katyusha rocket launcher played a very important role, here we take a look at what important role it .

In the atomic bomb has not yet appeared, the rocket artillery is indeed one of the most powerful weapons on the battlefield, in the battlefield of World War II Katyusha rocket artillery can be said to shine , it can be in a short period of time a very high number of explosives dropped on the enemy head, fire density beyond all the traditional artillery units, killing power, killing a wide range, the killing power. In response to the enemy's dense formation of troops when the effect is significant, in the suppression of enemy fire and destruction of enemy military fortifications can also play a fairly important role, so during World War II Katyusha rockets were used by the Soviet Union on a large scale, is one of the most important weapons in the fight against the German army.

The Soviet Red Army has always promoted artillery doctrine, the Soviet Red Army since the beginning of the construction of artillery firepower delivery as the focus, in the Soviet-German war Soviet artillery not only in the number of artillery has always exceeded the Germans, and artillery technology level has always maintained an advantage over the Germans, and has a mature theory of artillery operations. In the final battle of Berlin, this Katyusha rockets also played a very important role, the Soviet Union will be placed in the center of Berlin outside the eight kilometers, and then a command, all the rockets fired in unison, a *** nearly one million eight hundred thousand rounds of artillery shells fired in Berlin, thus playing the first gun of the Battle of Berlin.

So this is also an important weapon that laid the groundwork for victory in World War II, we also know what information about it?