The threat of Great Power in 19th century or 24th Buddhist era. The Imperialism was expanding to other countries in Asia, which that neighbour countries such as; Myanmar, Vietnam, Cambodia, Malayu, etc. All of that countries was under to control of the Imperialism and Thailand had weakness in underdevelopment, regime, and demarcation was clear. The King took care the country then, he proceeded the foreign policy compromise and hasten to develop the country by emphasize on the national education