In 207 BC Triệu Đà established a state called Nam Việt which encompassed southern China and the Red River Delta. The historical significance of the original Nam Việt remains controversial because some historians consider it a Chinese occupation while others believe it was an independent era. For most of the period from 111 BCE to the early 10th century, Vietnam was under the rule of successive Chinese dynasties. Sporadic independence movements were attempted, but were quickly suppressed by Chinese forces.