In 1227, on this day the Duke Swietopelk II of Pomerelia attempted to kill his arch rival, the High Duke of Poland and Prince of Sandomierz, Leszek the White (pictured).
Leszek the White SurvivesThe clumsy assassination attempt took place during a diet of the Polish Piast dukes at Gasawa. It was a direct result of Leszek having attempted to force the Pomeranian duke to submit to his authority.
Swietopelk had planned to declare himself independent from Polish vassalship. But instead of have to face his young son Bolesław, he would need to confront the fury of the surviving Leszek.