 In 1915 as the Russians retreated and the German army neared Raduń, the decision was taken that the yeshiva would be split into two parts.One would stay in Raduń and the second would move further inside Russia.Most of the students including the Chofetz Chaim, his son-in-law and Rabbi Trop left Raduń, while the minority remained with Rabbi Moshe Landynski and the Mashgiach ruchani Rabbi Yosef Leib Nendik.