Indian Defence Ministry Approves Mass Expansion of S-400 Air Defence Network with Purchases From Russia

The Indian Defence Ministry Defence Procurement Council has approved the purchase of additional Russian S-400 long range air defence systems, following reports over several months of a growing interest in placing orders. "The S-400 system will counter enemy long-range air vectors targeting vital areas," the Ministry announced in a statement, although not elaborating on the numbers intended for procurement. The Ministry was reported in early March to be preparing to place an order for ten additional battalions, doubling its arsenal, after the S-400’s performance during engagements with Pakistani forces in May 2025 drew considerable praise from local officials. 

The Indian Defence Ministry previously ordered ten battalions of S-400 systems in October 2018 under a a $5.43 billion contract, with the last of these battalions expected to be delivered in 2026. During clashes with Pakistani forces in May 2025, the system credited with having shot down least five hostile fighters and one large aircraft, which was reportedly either an ELINT or an AEW&C system. The downing of the large high value aircraft was achieved at a 300 kilometre range, highlighting the particularly long reach of the S-400’s unique 40N6 missiles which can engage targets at almost all altitudes and at up to 400 kilometre ranges. The missile’s Mach 14 speed allows the S-400s to shoot down hypersonic targets, with shootdowns of Mach 8 ballistic missiles having been demonstrated during testing. 

The Defence Ministry has been reported by local sources, including multiple officials, to be planning procurements of multiple very high value Russian aerial warfare systems to revolutionise its capabilities. Following confirmation in February 2025 that a license production deal for the Su-57 fifth generation fighter was being considered, the Ministry in January 2026 confirmed that these talks had reached an advanced technical stage. The Russian Defence Ministry in June 2025 was reported to have made an unprecedented offer to provide full access to the source code, placing Indian Su-57s entirely in a league of their own among fighters of their generation in their levels of customisability and the degree to which they can integrate indigenous technologies. The two countries are also holding talks to deeply modernise India’s Su-30MKI fighters, supply hundreds of R-37M very long range air-to-air missiles for the aircraft, and supply S-500 air defence systems capable of shooting downs satellites and space targets. The possibility of Su-57 procurements and customisation reaching the stage of a fully joint program has also been raised.