This article details a summary of the History of Thailand, starting from the founding of Sukhothai, the first truly “Tai” kingdom. Though the Tai people had migrated to and inhabited the area and state of Lavo in small numbers before this, kingdoms considered “Thai” would not be founded until Sukhothai was founded and Lavo was separated from the Khmer Empire by Suphannabhum princes.
Northern Thailand the oldest region in Thailand the main ethnic group Tai-Yuan established their own kingdoms: the semi-legendary Singhanavati Kingdom (691 BCE–638 CE) evolved into the Ngoenyang Kingdom (638–1292). In 1220, the Khmer controlled Sukhothai was conquered by the Thais and made the capital of the Sukhothai Kingdom. By 1220, the long declining Khmer Empire was mostly overrun by Thais.