DefenceFriday, 5 June 2026·The Hindu - National
India receives 4th S-400 squadron; AI-enabled air defence to strengthen long-range shield
India received the fourth squadron of the Russia-made S-400 system under the 2018 $5.43 billion deal, with AI-assisted targeting planned for deployment.
Key highlights
Direct fact
In May 2026, India received the fourth squadron of the Russia-made S-400 Triumf air defence system under the 2018 $5.43 billion contract for five regimental systems, with the remaining squadron expected in 2027.
Key specifics
- The 2018 India-Russia deal was worth $5.43 billion for 5 S-400 regimental systems.
- India has already inducted 3 S-400 squadrons, and the 4th squadron has now arrived.
- The remaining squadron under the original contract is expected in 2027.
- The S-400 is described as a long-range surface-to-air missile system capable of engaging aircraft, drones, cruise missiles and ballistic missiles.
- Officials said AI-enabled decision support will help prioritise threats, but the final engagement decision stays with the operator.
Exam lens
TNPSC defence-current-affairs question type: match the following and one-liner facts, 2018 $5.43 billion deal, 5 regimental systems, 4 squadrons received, 2027 delivery, AI-assisted targeting in S-400.