The Polish Calvalryman is a nice touch to the game. Thay will be easy to use in groups of 3 or 4 against soldiers. Im thinking the best way to use them will be to hide and rush machine gun nests.
Not just machine gun nests but also for going after BAR Gunners, anti-tank guns, and commanders. But I really don’t think you need more than 1 or 2 to accomplish this. It is very easy for the cavalry out of line of sight.