Historically, in some regions of the country khwaeng referred to subdivisions of a province (then known as mueang, predating the modern term changwat), while in others they were called amphoe.
Historically, in certain areas of the country, khwaeng was used to denote subdivisions of a province (formerly known as mueang, preceding the current term changwat). In other regions, however, they were referred to as amphoe.