Today, 372 years ago, in the year 1648, the Holy community of Polonnoye [Polonne, Ukraine], was slaughtered by the ruthless, barbaric cossacks, headed by the “Hitler” of his time, Bohdan Chmielnicky, ym”s.
10,000 holy souls were killed by the merciless cossacks, women and children, sick and old, no one was spared by their bloody hands. Between all of these Kedoshim, was the holy Tzaddik, known as Reb Shimshon, the Maggid from Ostropoliia [Ostropil, Ukraine]. He, with many other Jews, fled to Polonnoye to find shelter.
Source: Megias Affa, Pesach Teshuva