‘Sudarshan Chakra’ in combat: How Operation Sindoor reinforced India-Russia defence ties |
In April 2025, terrorists struck Baisaran meadow near Pahalgam in southern Kashmir, killing 26 innocent tourists in an act of calculated barbarity orchestrated from across the border.
India’s response, codenamed Operation Sindoor, was swift, precise, and strategically transformative. In the 88 hours that followed, from May 7 to May 10, India demonstrated a war-fighting capability that surprised its adversaries and reassured its partners.
At the heart of that demonstration was a pluralistic arsenal: French Rafale jets, Israeli loitering munitions, Indian‑made Integrated Air Command and Control System (IACCS), and Akash air defense systems. But the formidable core of this arsenal was Russian‑origin platforms that have formed the bedrock of Indian military power for more than six decades.
One year on, it is worth examining what Russia’s contribution to that arsenal actually meant in combat, and why the India-Russia defense partnership remains one of the most consequential strategic relationships in the Indo-Pacific. And how it continues to grow.
Strategic trust that matters
The India-Russia defense relationship is not a transaction. It is a partnership built on a foundation of consistent support through India’s most difficult strategic moments – when Western suppliers walked away after the 1998 nuclear tests, when sanctions threatened to choke India’s modernization program, and when the country needed technology transfers rather than merely hardware deliveries.
Russia provided all three, and did so without the political conditionalities that have sometimes accompanied Western defense partnerships. That consistency has created a level of strategic trust that is difficult to quantify but unmistakable in practice.
Over the past six decades, the two countries have built a defense relationship of extraordinary depth, one that now encompasses co-development, co-production, technology transfer, and joint ventures that have made India not merely a buyer of Russian equipment but a genuine partner in its manufacture and evolution.
The numbers tell part of the story. Approximately 60% of India’s current military inventory traces its lineage to Russian or Soviet-origin design. The Indian Air Force (IAF) flies the Su-30 MKI, arguably the most capable variant of the Flanker family anywhere in the world, built under license at Hindustan Aeronautics Limited (HAL) in Nashik with a progressively increasing indigenous content. The Indian Army fields the T-90 Bhishma main battle tank, again built domestically under license.
The Indian Navy operates Kilo-class submarines and has long operated Russian carrier aviation. This is not dependence – it is integration, and Operation Sindoor demonstrated exactly what that integration looks like when tested under fire.
The S-400 Sudarshan Chakra: Combat debut
Of all the Russian systems that performed during Operation Sindoor, none attracted more global attention than the S-400 Triumf, which India has named the Sudarshan Chakra.
India’s decision to procure the S-400 in a $5.43 billion deal signed in 2018 was made under considerable pressure. The US threatened to impose CAATSA sanctions, Western partners expressed discomfort. India held its ground, and one year ago that decision was validated in the most definitive way possible – in actual combat.
Pakistan’s retaliatory strikes on the night of May 8-9 targeted a wide arc of Indian military installations, from Srinagar and Pathankot in the north to Bhuj and Naliya in Gujarat. The attacks employed a layered mix of Chinese-origin drones, Turkish Bayraktar UCAVs, cruise missiles, and guided rockets. India’s multi-layered........