How to evaluate the Russian film purgatory with the Chechen war as its background?

After watching the movie purgatory, I couldn't calm down for a long time and was shocked by the almost actual combat scene in the film. The realism of the film can be seen. The plot of this film is not complicated. Russian and Chechen armies fought for a hospital in Grozny, and the hospital changed hands several times. A Russian army was surrounded by Chechen rebels and was in trouble. At the critical moment, the superior rescue force, the special warfare detachment, arrived in time and rushed into the hospital for support; A T-80 tank was blown off when it approached the hospital. The tank commander refused the temptation of Chechen rebels and opened the door to victory for the besieged Russian army with artillery fire.