India's 4th S-400 Triumf Regiment Ships from Russia — Arrives Mid-May, Deployment Along Pakistan Border

India's fourth S-400 Triumf long-range air defence system was shipped from Russia around April 28, 2026 following completion of pre-dispatch inspection by Indian Air Force officials on April 18. The system is expected to arrive in India by mid-May 2026 — days after the first anniversary of Operation Sindoor (May 7). The fourth squadron will be deployed along India's western front, specifically in the Rajasthan sector, bridging the existing S-400 deployments in Punjab and the Gujarat corridor to create an unbroken, overlapping air defence shield across the entire Indo-Pakistan border. India has also approved procurement of 280 additional S-400 missiles to replenish stocks used during Operation Sindoor's May 2025 engagement, when S-400 systems reportedly engaged Pakistani aircraft and drones. A fifth regiment is expected by November 2026, completing India's original 2018 $5.4B contract for five S-400 systems. The timing of the fourth system's arrival is strategically significant: it substantially closes the last air defence coverage gaps before what Indian planners assess as a higher-risk period around the Sindoor anniversary. India is also developing Project Kusha (350km-range indigenous LRSAM) and the Akashteer automated Air Defence Control and Reporting System to complement S-400 coverage.