S400 missile system Wikipedia
The S400 Triumf (Russian: C400 Триумф Triumf; translation: Triumph; NATO reporting name: SA21 Growler), previously known as the S300 PMU3, is a mobile, surfacetoair missile (SAM) system developed in the 1990s by Russia''s Almaz Central Design Bureau for Marine Engineering as an upgrade to the S300 family.. The S400 went into service on 28 April 2007.