edit Nvm I totally interpreted this backwards

In total, during this period, four export and four return military echelons were formed, ensuring the movement of three Belarusian air defense brigades and one rocket artillery brigade. Routes, trains and trains and nature of the transported property indicate that the activities were carried out within the framework of the planned annual practice of combat training and deep integration of Belarusian units into the training system of the Aerospace Forces and the Land Forces of the Russian Federation.

This suggests an updating and deeper integration of Belarusian air defenses with Russia.