For this game, the Polish High Command has decided to trade ground for time, hoping the French and British will launch an attack on the Germans in the west before the entire country is lost (Although rumor has it that any attack by the French and British is just wishful thinking on the Poles part). Polish units have been given orders to try and slow down the advancing German Army but not to get into a slugfest with them. If a Polish unit starts a turn in contact with a German unit and it is not behind a river, in a city or fortification, in mountains or forests, it will retreat in almost all cases. Also Polish units have been ordered not to attack any German units without direct orders from Rydz-Smigly (the leader of the Polish High Command). Such attack orders will probably be few and far between if any are ever given at all.
The Polish Air force will try and blunt any deep penetration by the German Panzers (bombing a unit reduces it's moral, readiness and integrity thus reducing the number of APs it has next turn), hopefully giving the Army time to move units into blocking positions. In addition, if any Polish unit has an opportunity to blow a bridge anywhere west of the Vistula/San and north of the Bug rivers, they are to do so at the earliest opportunity.
The screenshot below shows the situation of the Polish army the morning of 1 September '39 (the start of the Polish first turn) immediately after the German sneak attack. I'll leave this picture clean and post an annotated one in the next post.
