Thonburi Kingdom
The Royal Siamese Armed Forces was the military arm of the Siamese monarchy from the 12th to the 19th centuries. It refers to the military forces of the Sukhothai Kingdom, the Ayutthaya Kingdom, the Thonburi Kingdom and the early Rattanakosin Kingdom in chronological order. The Siamese army was one of the dominant armed forces in Southeast Asia. As Thailand has never been colonized by a European power, the Royal Thai Armed Forces boasts one of the longest and uninterrupted military traditions in Asia.