Thailand · History · Hard
Answer: Franco-Siamese Treaty of 1893 — The 1893 treaty, signed under French gunboat duress after the Paknam Incident, forced Siam to cede all territories east of the Mekong River, creating modern Laos as a French protectorate.
The 1893 treaty, signed under French gunboat duress after the Paknam Incident, forced Siam to cede all territories east of the Mekong River, creating modern Laos as a French protectorate.