Fourth S-400 regiment reaches India, deployment expected in Rajasthan - India Today
The S-400 system gained significant attention during Operation Sindoor in May 2025, when it played a crucial role in India's air defence operations by intercepting hostile aerial threats. Its performance reinforced confidence in the platform's capabilities and contributed to the government's decision to approve the acquisition of five additional S-400 squadrons, which would eventually double India's planned inventory to ten units.