You are probably refering to the video of soldiers on horseback trying to stab tanks with lances.
That was a propaganda video, and it was complete B.S.
Horses were used then as living ATVs, being much faster than walking. The cavalry didn't try to poke tanks (they would have had to be very stupid do that). They were equipped with anti-tank rifles, like the Maroszczek, which could penetrate the thinner armor of the early panzers.
If you would like to read a great book about Poland and WWII, my first recommendation would be to get "A Question of Honor" by Lynne Olson, and Stanley Cloud.
Website: www.questionofhonor.com
If you don't have much time, but are still interested in this topic, a good website is www.polandinexile.com
Besides the 1939 campaign, I think the battles of Britain, Monte Cassino, Bologna, Ancona, and Studzianki would interest you, as well as the Warsaw Uprising.
Some more famous Polish units were:
Kosciuszko Squadron (RAF 303 Squadron), which were the top scoring unit in the Battle of Britain
II Polish Corps, which took, among other strongholds, Monte Cassino and Ancona. They never lost a battle.
Now, about Ukraine, I really hope this blows over and nobody starts fighting. There is nothing worse than countryman fighting countryman.
I hope Walesa has smartened up in the last decade.
He seemed great for a while, being against communism, but he pretty much sold off Poland for pennies to foreign companies to try to get rid of the debt that he added to after the communists were thrown out.
If you go to Poland today, you will find that anything Polish is rare! Nearly every large store is German or French. Even most food companies have been bought by foreign companies (ex. Cadbury Wedel). We have Walesa to "thank" for a lot of it. He isn't exactly the most intelligent man. He could barely write when he was president. He is one of those guys who wants something good, but just knows how to argue a lot.
I just hope he doesn't let us down this time, and helps Ukraine work out their problem.
May God be with us.
Amen to all that. I hope so too.