 The SN organised numerous rallies and demonstrations against the policies of the Sanacja government.It had the most influential political centres in Greater Poland, Pomerania, Warsaw, Wilno and Lwów.Prominent leaders of the old generation included Stanisław Stroński, Marian Seyda, Roman Rybarski, Stanisław Głąbiński, Witold Staniszkis, Wacław Komarnicki, Jan Zamorski, Jan Załuska and Stanisław Rymar.