“I got to imagine it already feels hopeless for those units in the field.”
To say the least...
Polish commanders are losing control of their units, all the way down to battalion and company levels at this point.
Individual units are still putting up stiff resistence at points, but they have no organized support. The Generals in Warsaw passing out orders to commands they don’t know don’t exist, anymore. Withdrawing units have left supplies behind in the retreat, and are running out of ammo and fuel.
And everyone is trying to get through to Modlin, Warsaw, or Lvov. Chaos on the roads, refugees clogging arterys, and realizing that you can only move at night, because come dawn those roving bands of fighter aircraft will be returning to harrass the columns...
One of the things that the Germans did very effectively at the onset of the war was destroy the Polish communication lines. To do this they made good use of 5th column personnel that they already had in place as well as paratroopers that were dropped behind the lines solely for that purpose. It made it almost impossible for the Polish HQ in Warsaw to coordinate any type of real defense between the separate divisions.