20/25.2.1831 battle near Grochow/Olszynska Grochowska

party1: insurgent Poles
commander1: Prinz Radziwill
troops1: 50000
losses1: 9000+500

party2: Russians
commander2: Graf Diebitsch
troops2: 80000
losses2: 10000+500
(Victory of insurgent Poles or (perhaps) indecisive)