[rwb]

The Poles did NOT charge tanks with cavalry

I don't know, I wan't there, but I think that a few instances did occur.
Here's a website that supports your point of view:

http://mops.uci.agh.edu.pl/~rzepinsk/1939/html/cav.htm

Except the author forgot one thing. The Wermacht assault on Poland was highly organised, and all infantry was supported by armour.
The only thing I can say is that maybe at the time they didn't realise Nazi tanks were present.

[Scott from the Left Coast]

It's probably a bit silly to be arguing semantics vis-a-vis World War II, but the Poles did primarily use horse drawn trailers for transporting supply in 1939, and they did actually have some rifle units (infantry) that used horses for transport. While these units often showed great bravery in facing the Wehrmacht, it is highly unlikely (no known instances) that any such units used horses to advance against armor. It is a fact, however, that Polish infantry was often seen retreating on horseback -- and undoubtedly they fought while retreating.

Of course, other than the trivia aspect, it really has no relation to this situation. I suspect that in the very rugged country it isn't unheard of here for soldiers engaging in reconnaisance to use horses for transport. Obviously, they aren't engaging tanks by charging on horseback, only someone completely out their mind and willing to commit suicide for no gain would attempt such a thing.