In 1774, King Hsinbyushin of Burma ordered Mingyi Kamani Sanda the governor of Martaban to organize armies to invade Siam from the west through the Three Pagodas Pass.
This incident led to mass migration of Mon people from Martaban into Siam through the Mae Lamao and Three Pagodas Passes.
King Taksin allowed the Mon refugees to build settlements in the area of Nonthaburi from Pak Kret to Sam Khok.
During the reign of King Rama I, Binnya Sein was appointed Phraya Mahayotha, commanding all Mon armies and accompanying him in every war.
Later, in 1787, he was graciously promoted to Chao Phraya Mahayotha Narathibodi Si Phichai Narong, due to his great deeds when King Rama I went to conquer Thawai.
[5] His son, Chao Phraya Mahayot (Thoria), took over the position of ruler of the Mon people in Nakhon Khuen Khan after his death.