Henryk IV Probus
After Leszek obtained his political independence in 1261, he rapidly established good relations with Bolesław the Chaste, ruler of Kraków and Sandomierz. The two princes meet for the first time in 1260, on occasion of the expedition against the Kingdom of Bohemia, which was part of a broader action during the Hungarian-Bohemian War for the Babenberg inheritance. Leszek's participation in the war against Bohemia and its allies (Henryk IV Probus and Władysław Opolski) continued in later years, with particular intensity between 1271-1273.