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India has received the fourth squadron of the Russian-origin S-400 Triumf air defence missile system, marking a significant step in strengthening the country’s long-range air defence network amid evolving regional security challenges.
The latest S-400 squadron arrived in India a few days ago and is expected to be deployed in an operational sector shortly. It is the fourth of the five squadrons contracted under the $5.4 billion agreement signed with Russia in 2018. Three S-400 squadrons are already operational and have been integrated into India’s air defence architecture, which was combat tested during Operation Sindoor in 2025.
The delivery comes after delays caused by disruptions linked to the Russia-Ukraine conflict, which affected Moscow’s defence production and export schedules. With the arrival of the fourth unit, only one squadron remains to be delivered under the original contract. The final delivery is expected by the end of the year.
Russia has indicated that the pending deliveries are back on track. Dmitry Shugayev, head of Russia’s Federal Service for Military-Technical Cooperation (FSVTS), stated last week that the remaining systems are being supplied according to the revised schedule.
Moscow has also confirmed that discussions are underway regarding India’s interest in procuring additional S-400 systems.
“India has expressed interest in the delivery of an additional batch of these systems. Russia stands ready to fulfil this, and the corresponding negotiations are underway,” the FSVTS told Russia’s Interfax news agency on May 26.
The development comes as India continues to modernise its air defence capabilities in response to emerging threats, including advanced combat aircraft, cruise missiles, ballistic missiles and unmanned aerial systems.
The S-400 is regarded as one of the world’s most capable long-range surface-to-air missile systems. Designed to detect, track and engage multiple aerial targets simultaneously, it provides layered protection against a wide spectrum of threats at ranges extending up to 380 kilometres.
Each S-400 squadron comprises 16 vehicles, including command-and-control systems, surveillance and engagement radars, and missile launchers. A squadron consists of two batteries, each with six launchers, carrying a substantial missile inventory capable of engaging targets at varying ranges.
The induction of the fourth squadron is expected to significantly enhance India’s ability to defend critical military and strategic assets across multiple theatres. The system has emerged as a key pillar of the country’s integrated air defence network, particularly amid heightened security concerns along both its western and northern borders.
India is also examining the possibility of expanding its S-400 inventory. The Defence Acquisition Council (DAC) has cleared proposals for the acquisition of five additional S-400 squadrons, signalling continued confidence in the system’s operational value.
At the same time, New Delhi is pursuing greater self-reliance in air defence technologies. Under Project Kusha, India is developing an indigenous long-range air defence system intended to provide capabilities comparable to those of advanced foreign systems, such as the S-400.
The programme aims to create a domestic solution capable of intercepting aircraft, cruise missiles, ballistic missiles and drones at extended ranges. Several Indian defence companies, including major private-sector players, are expected to contribute to the programme’s development and production.
While Russia remains India’s largest legacy defence supplier, New Delhi has increasingly diversified its procurement strategy over the past decade, sourcing advanced military platforms from France, Israel, the United States, and Germany while simultaneously expanding indigenous defence manufacturing under the government’s self-reliance initiative.
The arrival of the fourth S-400 squadron underscores India’s continued focus on building a robust, layered air defence shield even as it balances foreign acquisitions with long-term domestic capability development.
Team BharatShakti
