Territorial losses of Thailand

The territorial losses of Thailand is a concept in Thai historiography, referring to conflicts during the Rattanakosin period of Thailand (or Siam as it was historically known) where the country was forced to cede territory, especially to the Western powers of France and Great Britain during the reign of King Chulalongkorn (Rama V, 1868–1910). The concept was popularized in the 1930s as part of the Thai nationalism promoted by the government of Plaek Phibunsongkhram.

Source: Wikipedia — Territorial losses of Thailand (CC BY-SA 4.0)