The Polish National Guard troops (On) struggled all game, they were easily disrupted and demoralized by the German OBA, mortar and HMG fire, but the armored train and Draisine’s kept the game interesting for the first three quarters of this scenario. Then the train was knocked out and it was all downhill from there for the Pols. This might not happen in your play through but this one unit, the Polish train & to a lesser degree the Draisine's single handedly held up the German advance.