The Russian-made S-400 air defence system played a crucial role during India’s Operation Sindoor earlier this year. The Indian Air Force called the S-400 a true “game-changer” in the three-day standoff, thanks to its advanced surface-to-air missile capabilities. Now, as Russian President Vladimir Putin arrives in India today, New Delhi is looking toward the S-400’s more advanced successor, the S-500 Prometheus air defence system. India’s plan to acquire more S-400 units, upgrade its Sukhoi-30 fighter jets, and buy other important military equipment from Russia is expected to be discussed during Defence Minister Rajnath Singh’s meeting with his Russian counterpart, Andrey Belousov, on Thursday.

Belousov is part of President Putin’s high-level delegation to India. The meeting between the tw

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