Registered Cossacks
According to Leszek Podhorodecki, his forces numbered about 12,000, with 30 artillery pieces; and were composed of the regular army boosted by Registered Cossacks and forces of local nobility, both the pospolite ruszenie and some chorągiew units sponsored by the magnates. The Cossack leader Marek Zhmaylo had numerical superiority, gathering about 20,000 men under his banners.