Which country deployed first ‘Avangard’ Hypersonic missile in its defence system. This hypersonic missile can fly 20 times faster than the speed of sound (33,000 km/h)?

Question

Accepted Answer

Russia. Russia is cited as the country that deployed the 'Avangard' hypersonic missile. China has developed its own advanced missile systems but is not credited with deploying this specific one first. The USA has various advanced missiles but the deployment of 'Avangard' is attributed to Russia. South Korea does not have a record of deploying this particular missile system.