In this map, the Khmer Empire composed of modern day Kingdom of Cambodia, most of southern Vietnam (Kampuchea Krom or the Mekong Delta), Laos, and Kingdom of Thailand.

The empire's frontiers extend to the North China, to the South Malaysia, to the West Myanma (or Burma), and to the East Kingdom of Champa, South Vietnam (Kampuchea Krom or the Mekong Delta) and South China Seas.

Vietnam was not called Vietnam. It was called Dai Viet.

Champa is a buffer between the Khmer Empire and Dai Viet.

There was no Laos.

There was no Thailand.

The Khmer Empire was the Greek Empire in Southeast Asia.

Map of the Khmer Empire

Royal Palace Grounds, Phnom Penh

The map shows the Khmer Empire at its greatest extent, from the 12th-13th centuries. To the left is Burma, with Arakan at its border (far left). To the right are North Vietnam (Dai Viet) and South Vietnam (Champa); China at the top (appropriately colored red); and a slice of Malaysia (green) at the very bottom of the map. Laos and Thailand are not shown on this map, because the countries did not exist at that time.

The Indochinese Peninsula in the 12th-13th centuries.

Courtesy: The Royal Palace, Cambodia, 2008

Courtesy www.art-and-archaeology.com

The Khmer Empire at its height, approximately 1100 A.D.

Map of [Nokor] Chenla [Khmer]