sentences:  John I Albert, in contrast to his father, refused to lose the battle and in August 1495 Polish troops reached Płock; Konrad III, watching the impossibility to resist, decided to give up.The successful incorporation of Płock to the Polish kingdom, however, wasn't enough for John I Albert, who in February 1496 ordened Konrad III to presented himself at Piotrków Trybunalski, where he was further humiliated by paying homage to the king for his lands, who after his death would be incorporated to the crown; only the district of Czersk was granted to him as hereditary domain for his descent.The events of Piotrków Trybunalski limited the internal policy of Konrad III, because from then forward, every nobleman who had a conflict with the duke would be expected to receive the support of the king.