Russia will be going to deliver the first regimental set of S-400 Triumf ‘SA-21 Growler’ air defence systems from November this year. Earlier, in October 2018 India had signed a contract with Russia worth USD 5.43 Billion for the procurement of five regimental kits of S-400 Triumf ‘SA-21Growler’. These long-range surface-to-air missile (SAM) systems are basically for the Indian Air Force (IAF) which will help in further enhancing the air defence. The delivery is expected to be completed ahead of 2025.