Originally Posted by
pasta
The second and third lines of defense are presumably there to stop the first line of defense retreating...
From old memory, a withdrawal under fire is considered a very difficult maneuver to pull off, and that's with a disciplined and well trained unit. (And even tougher if you are being shot at from your own side during the withdrawal!
)
Not sure if this is wishful thinking, as I am not sure how much momentum UKR can maintain at the moment.
Interesting picture illustrating the challenge of "how do you get across the various waterways if the bridges are blown?"
Here's a situation where having a lot of drones and UAVs up in the air could make the sensor-to-shooter link pretty tight, if UKR wants to cause some damage as various waterways get crossed.