Rattanakosin Highlands | สมรภูมิเขาสูงรัตณโกสินทร์

Traditional rivalries and dispute over Mon rebels and the Tenasserim coast led to the Burmese-Siamese wars in the eighteenth century. In 1767, the Burmese of the newly founded Konbaung dynasty invaded and destroyed the Ayutthaya Kingdom. King Taksin of Thonburi reunited Siam in the aftermath of the destruction of the Ayutthaya government and capital. In 1774, most of the Lanna Kingdom, which had been under the Burmese rule for about 250 years, came under Siamese domination with exception of Chiang Saen still under Burmese rule. During the Burmese–Siamese War (1775–1776), Siam nearly succumbed to the Burmese forces led by General Maha Thiha Thura and Siam's manpower was depleted.