What is the S-400 Triumf? Air Defense Missile Systems The S-400 Triumf, previously known as the S-300 PMU-3, is a mobile surface-to-air missile (SAM) system developed by Russia’s Almaz Central Design Bureau for Marine Engineering in the 1990s as a replacement for the S-300 family. On April 28, 2007, the […]
S-400 Triumf
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