Despite the Polish OBA making some damage (it killed a squad, STUNNED and then killed a HT, and broke some squads slowing the German advance), the 5-to-1 numerical superiority of the Germans overwhelmed the Polish defenders on the northern hill.
The other HT was STUNNED by HMG fire and both of them played no part in the battle, but this did not affect the scenario outcome.
On a side note, a previously broken Polish squad self-rallied and attempted to go back to its set-up hex, but was wiped out by German fire as soon as it entered the level 1 hexes.
I will try making some experiments on this breakthrough scenario issue.
