Naresuan

Prince Naresuan declared Ayutthaya's independence from the Toungoo dynasty of Burma, refusing to be a vassal state. This act triggered a series of wars between Ayutthaya and Burma.

King Naresuan reorganized the Ayutthaya military, introducing new tactics and training methods. He also expanded the use of firearms and elephants in warfare, making the army more effective.

King Naresuan of Ayutthaya defeated the Burmese crown prince in single combat on elephant back at Don Chedi. This victory secured Ayutthaya's independence from Burmese suzerainty and is celebrated as a national triumph.

King Naresuan led an Ayutthaya army to capture the Burmese capital of Pegu. This victory temporarily weakened the Toungoo dynasty and expanded Ayutthaya's influence into Burmese territory.