First Era of Northern Domination

The First Era of Northern Domination refers to the period of Vietnamese history during which present-day northern Vietnam was under the rule of the Han dynasty and the interregnum Xin dynasty as Jiaozhi and Jiaozhou Commanderies. It is considered the first of four periods of Chinese rule over Vietnam, and the first of the three in which were almost continuous and was referred to as Bắc thuộc ("Northern Domination").

Source: Wikipedia — First Era of Northern Domination (CC BY-SA 4.0)