Isan people overran the Lao Wang and forced them into corvee Iintermitten unpaid labour expected by landowners or monarchs) labour before they were integrated into Isan farming; much of Isan was populated this way.
The Isan people (Thai: , RTGS: Khon Isan, Thai pronunciation: [kon isan; Lao: ) or Northeastern Thai people are an ethno-regional group native to Northeastern Thailand ("Isan") with an estimated population of about 22 million. 
