You are wrong:
Before the 13th century, pospolite ruszenie was the customary method employed in the raising of Polish armies. Gradually, however, because of concerns about the stability of the economics of feudalism, and the perceived unreliability of untrained peasants, it became rare for large numbers of them to be mobilised; therefore only landowners were mobilised. The landowners included knights — who were later granted szlachta status.
Btw. It is called also Polish Common Movement
I have forgotten. Polish Common Movement should have various equipment.