Hvis russerne hindrer evakuering så er det vel primært for å unngå at de som kan antas å ville fortsette å kjempe imot dem slipper ut. Det er vel også årsaken til at de gikk frem som de gjorde i Syria,
Here is how Russian military practice works:
First, approach and try to block or surrender the city
Second, suppress the main enemy firing positions
Third, make sure that the city is truly blocked (except for a few special corridors, see below)
Fourth, hold your position and reconnoiter the outermost enemy lines (by fire when appropriate)
Fifth, send in special reconnaissance groups inside the city to observe and coordinate attacks
Sixth, once the city is surrounded/blocked and once you get a pretty decent picture of what is inside you take the next decisions which might include any of the following: open corridors for civilians to flee and for military personnel to surrender and cross over, determine the main axes of attack and begin slowly grinding down the opposition with heavy firepower (artillery, air, missiles).
Seventh, once the city’s defenses have been sufficiently disorganized, begin a house to house mopping up operation by specialized forces.