In 1775 there came the hugest invasion of the Burmese led by Maha Thiha Thura. Instead of dividing the forces invading through various ways, Maha Thiha Thura amassed the troop of 30,000 as a whole directly towards Phitsanulok whose inhabitants were only 10,000 in number. Paw Thupla and Paw Myunguaun from Chiang Saen attempted to retake Chiang Mai but were halted by the two "Chao Phraya"s, who after Chiang Mai hurried back to Phitsanulok to defend the city. The engagements occurred near Phitsanulok.