from Nyaung-u Sawrahan and in turn was overthrown by the sons of Nyaung-u Sawrahan, Kyiso and Sokka-te , who forced Kunhsaw Kyaunghpyu to become a monk .When Anawrahta came of age, he challenged the surviving brotherSokka-te to single combat and slew him. Anawrahta offered to returnrulership to his father, who refused