A video released by ordinary Russian citizens captured the movement of these Russian S400 systems to the Voronezh area east of Luhansk.

If this video is indeed recent it shows its intention to deploy an anti-air umbrella in its border region from Luhansk to Crimea.

This anti-aircraft umbrella is expected to be particularly useful against the Turkish Bayraktar TB2 purchased by Ukraine but also to act as a “deterrent” to potential threats from NATO & the US.

The S-400 Triumfwith NATO reference name: SA-21 Growler, formerly known as-300PMU-3,^‎‎is an anti-aircraft weapons system developed in the 1990s by Russia’s Almaz Central Planning Office as an upgrade of the family of S-300 anti-aircraft missiles.