India's air defense capabilities are set to receive a significant boost with Russia confirming the delivery schedule for the remaining two squadrons of the S-400 Triumf missile defense system. According to recent reports, these deliveries are expected to be completed by 2027, with one unit arriving in 2026 and the final one in 2027. This development reinforces the strategic defense partnership between India and Russia and enhances India's ability to counter aerial threats.

The S-400 Triumf, known as SA-21 Growler by NATO, is a long-range, all-altitude surface-to-air missile system designed to engage a variety of targets, including aircraft, unmanned aerial vehicles (UAVs), cruise missiles, and ballistic missiles, within a range of up to 400 km. This advanced system can track up to 300 targets simultaneously and engage up to 36 targets at once, making it one of the most capable air defense systems in the world. Each regiment typically includes two batteries with four launchers each, capable of firing 32 missiles. The system's radar can detect targets up to 600 km away. The S-400 uses various missile types, including the 9M96E/9M96E2 (up to 120 km range), 48N6E3 (approximately 250 km range), and 40N6E (up to 400 km range), providing a layered defense against diverse threats.

India had signed a USD 5.43 billion deal with Russia in 2018 for five squadrons of the S-400 system. So far, three squadrons have already been delivered and deployed, strengthening India's defense architecture along its western and northern borders. These systems have been integrated into the Indian Air Force's (IAF) air defense network and are strategically positioned to counter potential threats from both Pakistan and China. The S-400 system has also been re-christened as "Sudarshan Chakra" in Indian service, after the mythological weapon of Lord Krishna.

Recent statements from Russian officials, including the Deputy Chief of Mission in India, Roman Babushkin, have highlighted the S-400's effectiveness during recent India-Pakistan tensions. This underscores the system's strategic value in ensuring regional security. There are also ongoing discussions to expand bilateral cooperation between India and Russia in air defense and anti-drone systems, signaling a deeper collaboration in addressing modern security challenges.

The acquisition of the S-400 missile defense system is a critical component of India's efforts to modernize its armed forces and enhance its defense capabilities. With the delivery of the remaining two squadrons by 2027, India will possess a formidable shield against a wide array of aerial threats, reinforcing its strategic position in the region.