Thawun Gyi by primogeniture became the ruler. He was wary of his ambitious younger brother, who coveted the job, but made him his deputy nonetheless. He also brought in Kayin Ba, a commoner from the nearby Htihlaing village, into his inner circle, appointing him chief of law enforcement. It is not clear if he ever sought or received formal recognition from King Narathihapate. At any rate, within the four years of Toungoo's founding, the kingdom came under the Mongol invasions. By 1287, the country had been broken up into multiple rival centers, with each ruler claiming independence. Thawun Gyi never submitted to King Kyawswa (r. 1289–97), who ruled only around Pagan. He did submit later at an unspecified date to the Myinsaing rulers who by 1310 had reunified Upper Burma. The royal chronicle "Hmannan Yazawin" lists Toungoo as a tributary state.