Russia has already transferred the S-400 Triumph complexes to Belarus.

In Belarusian Grodno, Russian anti-aircraft missile systems S-400 "Triumph" were spotted, airlifted to a neighboring country by a train. As follows from the information provided, we are talking about at least one division. At the same time, sources from neighboring Belarus claim that the complexes will not take a direct part in the West-2021 military exercises, but will be deployed near the western Belarusian borders on a permanent basis.

In the photographs presented, you can actually see vehicles from the S-400 Triumph air defense missile system, and although the launch containers themselves were not shown in the photo, it is obvious that the Belarusian side is seriously intending to provide protection from NATO on its western borders.

At the same time, another source claims that the appearance of the Russian S-400 Triumph air defense systems in neighboring Belarus is connected with the intentions to create a joint training center for Air Force and Air Defense specialists, which was previously reported, and the latter was supposed to be opened in the Grodno region. ...

The arrival of the Russian S-400 Triumphs in Belarus has not yet been commented on by the Belarusian authorities, however, it became known earlier that Minsk and Moscow are negotiating the supply of these air defense / missile defense systems to Belarus.