Bhumibol Adulyadej of the Chakri dynasty reigned as the ninth monarch of Thailand. Reigning from 1946 until his death in 2016, Adulyadej is the second-longest reigning monarch in the history. During his reign, Bhumibol Adulyadej retained enormous constitutional powers and was extremely popular among his subjects, with some even seeing him as close to divine.
Chulalongkorn reigned as the king of Siam from 1868 until his death in 1910. Nicknamed the Royal Buddha, Chulalongkorn's reign witnessed the modernization of Siam; several social and governmental reforms marked his reign. Since the reforms ensured Siam's survival despite Western colonialism, Chulalongkorn earned the title, the Great Beloved King.
Vajiralongkorn became the king of Thailand at age 64, following his father Bhumibol Adulyadej’s death, becoming the oldest to ascend to the throne. He was once seen dressed in a crop top, with his mistress, in a viral video. He sparked protests after moving to Germany during the COVID-19 pandemic.
The son of Cambodian king Ang Eng, Ang Chan II, also known as Udaraja III, was recognized as a king by the Thais. He maintained good relations with both Vietnam and Siam, so that peace could be maintained in Cambodia. Following his death, both Vietnam and Siam took over control of Cambodia.