Every year, large-caliber multiple launch rocket systems are acquired by more armies in the world. The most important weapon of war - artillery - was one of the most important ever, now we have further growth trends in its development and acquisition, even despite the fact that the XXI century has generated a huge variety of aircraft and even managed, that not so long ago it was still only limit dreams of rockets being useful for various purposes.
This trend is not fading away due to the fact that there is a constant multidirectional improvement, development and refinement of artillery systems. To date, the most powerful caliber are multiple rocket launchers(MLRS). The development of these systems has led such that most powerful of them can wipe out entire army units and connections. Previously, 300 millimeter MLRS, only one was a proud of the Soviet Union, and now such systems become adopted by more and more countries, some of them have started their own production of MLRS.