Cambodia, officially the Kingdom of Cambodia, is a country in Mainland Southeast Asia. It borders Thailand to the northwest, Laos to the north, Vietnam to the east, and has a coastline along the Gulf of Thailand in the southwest. It spans an area of 181,035 square kilometres (69,898 square miles), and has a population of about 17 million. Its capital and most populous city is Phnom Penh. In 802 AD, Jayavarman II declared himself king, uniting the warring Khmer princes of Chenla under the name "Kambuja". This marked the beginning of the Khmer Empire.
https://en.wikipedia.org/wiki/Cambodia