You know what, I was wrong about the last charge being in 1939. I did find another web page that shows the last calvary charge was on March 1, 1945 made by the 1st Warsaw Calvary Brigade. These were Polish units fighting with the Soviets till the end of the war.
link: [url]http://www.suite101.com/content/the-polish-wwii-cavalry-in-1939-a66108/url]
I hate to use website as definitive proof, but this is the only source I could find on the Polish troops fighting with the Soviets in 1945. Bear in mind though, much of my books about Poland in WWII are written about the Polish fight against the Germans and the Soviets. Many of the authors are less than polite when it came to talking about the Red Army.
There are so many myths about the Polish forces during WWII. It's easy to mistake fact from a work of fiction. Finding books on the subject are very difficult to find. Most of my reading is from journals and articles about the subjects.
link: [url]http://www.polamjournal.com/Library/APHistory/Cavalry_Myth/cavalry_myth.html/url]
But, it's a great conversation topic.