S-400 dispatch from Russia: Where will India’s ‘Sudarshan Chakra’ be deployed?

India’s fourth squadron of the Russian-made S-400 Triumf air defense system, designated 'Sudarshan Chakra' by the Indian Air Force (IAF), is expected to arrive this month after departing Russia. The system has transitioned from a strategic asset to a combat-proven platform following its reported deployment during Operation Sindoor in May 2025. The original 2018 agreement with Russia, valued at $5.43 billion, covers five squadrons, with three already operational across key sectors. The fourth squadron’s arrival marks a significant milestone, while the fifth is anticipated by late 2026, though logistical delays may push it to early 2027. India is also negotiating for an additional five squadrons—raising the total to ten—along with 280 interceptor missiles to replenish stocks, driven by the system’s performance in the May 2025 India-Pakistan military confrontation. The S-400, produced by Russia’s Almaz-Antey, is one of the world’s most advanced long-range air defense systems, capable of simultaneously tracking and engaging aircraft, missiles, stealth platforms, and drones over 400 kilometers. Its 40N6E interceptor missile neutralizes high-value targets like bombers and surveillance aircraft well before they reach Indian airspace, creating a robust anti-access zone. India integrates the S-400 into a layered, networked air defense framework combining indigenous and imported systems. Unlike Western systems focused on ballistic missile defense, the S-400’s multi-threat capability makes it critical for countering diverse aerial challenges along India’s western and northern borders. Its networking ability ensures seamless coordination with other defense assets, enhancing operational effectiveness. Deployment of the fourth squadron is likely in Rajasthan, a strategically sensitive region near the Pakistan border. The expanded inventory will further strengthen India’s air defense posture, addressing vulnerabilities in both conventional and asymmetric warfare scenarios.