Burmese–Siamese War (1547–1549)
The Burmese–Siamese War (1547–1549) (Burmese: ယိုးဒယား-မြန်မာစစ် (၁၅၄၇–၄၉); Thai: สงครามพม่า-สยาม พ.ศ. 2090–2092), also known as the Tabinshwehti war (Thai: สงครามพระเจ้าตะเบ็งชเวตี้) was the first war fought between the Toungoo dynasty of Burma and the Ayutthaya Kingdom of Siam, and the first of the Burmese–Siamese wars that would continue until the middle of the 19th century.
Source: Wikipedia — Burmese–Siamese War (1547–1549) (CC BY-SA 4.0)