[RERomine]

Keep in mind that the game level sets a lot of stuff. During the war, the Germans beat the Poles with superior tactics, better training and organization. The game on the other hand, balances a lot of things. If you have a more experienced force, the AI gets more points to spend. It is possible to have Polish aircraft show up that was rare during the war. The AI artillery seems to have a super natural ability to drop on units that should otherwise be hidden. The Polish guns in 1939 were very capable of defeating German tanks of the day. Losing five tanks is quite capable of happening.

Now that my core has Panthers and Tigers, like yours, I don't lose tanks as much, but I still lose them. There is nothing careless about having a 155mm round or a 500lbs bomb drop on a turret. In battle, units are destroyed. Losing a Tiger with 100 kills hurts much more than losing a mark IIb with none, but it's just something that happens. When it does, you continue the mission.