The S-500 Prometey, also known as 55R6M "Triumfator-M", is a Russian surface-to-air missile or anti-ballistic missile system intended to replace the A-135 missile system currently in use, and supplement the S-400. Initially planned to be in production by 2014, finally first delivered in 2021.

The S-400 Triumf, previously known as the S-300 PMU-3, is a mobile, surface-to-air missile (SAM) system developed in the 1990s by Russia's Almaz Central Design Bureau for Marine Engineering as an upgrade to the S-300 family. On April 28, 2007, the S-400 went into service and the first battalion of the newest surface-to-air missile systems assumed combat duty on August 6, 2007.

The S-300 is a series of initially Soviet and later Russian long range surface-to-air missile systems produced by NPO Almaz, based on the initial S-300P version. The system was developed to defend against aircraft and cruise missiles for the Soviet Air Defence Forces. Subsequent variations were developed to intercept ballistic missiles. The S-300 system was first deployed by the Soviet Union in 1979.

Music background " Cavalry " by Aakash Gandhi provided at Youtube Audio Library

Playlist of U.S. Special Forces at this channel :
►https://www.youtube.com/playlist?list=PLHRJJtk7ii41vbMEthRo6wNdcvQehjIL_

Playlist of Non U.S. Special Forces at this channel : ►https://www.youtube.com/playlist?list=PLHRJJtk7ii40A4RAf1H4sYgkME7obAicw