S-400 Triumph Air Defence Missile System
Credit: Rosoboronexport. The S-400 Triumph (NATO reporting name: SA-21 Growler) is an air defence missile system developed by Almaz Central Design Bureau of Russia. The new system replaced the S-300P and S-200 air defence systems of the Russian Army. The S-400 was developed as an upgrade of the S-300 series of surface-to-air missile systems.