S-400 Triumf Air Defence System
The S-400 Triumf (NATO reporting name: SA-21 Growler) is Russia's most advanced long-range surface-to-air missile defence system. It can simultaneously track and engage multiple targets — including aircraft, ballistic missiles, cruise missiles, and drones — at ranges of up to 400 km and altitudes up to 30 km. India signed a contract in October 2018 to purchase five S-400 regiments for $5.43 billion, with deliveries beginning in 2021.
- Each regiment consists of command systems, radar complexes, launcher vehicles, and missiles capable of engaging different threat profiles simultaneously.
- India's three operational regiments are deployed along the northern and western borders, providing a layered air defence shield against threats from both China and Pakistan.
- The system's advanced radar can track 300 targets simultaneously and engage 36 targets at a time, filling a critical gap in India's Integrated Air Defence architecture.
- India's new DAC clearance for five additional regiments (branded "Sudarshan") would significantly expand national air defence coverage.
● Tracked since March 26, 2026 · last seen April 28, 2026 · updates as the daily brief publishes
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