[1]: 41–42  Mahinthrathirat was known for his efforts to counter Burmese and Phitsanulok power by seeking alliance with Setthathirath of Lan Xang.

This forced Maha Chakkrapat to abdicate the throne to his son Mahinthrathirat, who planned a joint-attack on Phitsanulok with Setthathirat.

Mahinthrathirat embraced the returned general with trust and appointed Phraya Chakri commander of the Siamese defenses.

Phraya Chakri was able to place the less-trained and incompetent troops in the front of the Burmese attack, and thus were easily defeated.

[2]: 42–62 Bayinnuang installed Maha Thammarachathirat as the King of Ayutthaya on 29 September 1569,[note 4] tributary to Pegu.