<P> At the same time, in present - day Central Vietnam, there was a successful revolt of Cham nations in 192 . Chinese dynasties called it Lin - Yi (Lin village; Vietnamese: Lâm Ấp). It later became a powerful kingdom, Champa, stretching from Quảng Bình to Phan Thiết (Bình Thuận). </P> <P> In the period between the beginning of the Chinese Age of Fragmentation and the end of the Tang dynasty, several revolts against Chinese rule took place, such as those of Lý Bôn and his general and heir Triệu Quang Phục; and those of Mai Thúc Loan and Phùng Hưng . All of them ultimately failed, yet most notable were those led by Lý Bôn and Triệu Quang Phục, whose Early Lý dynasty ruled for almost half a century, from 544 to 602, before Sui China reconquered their kingdom Vạn Xuân . </P> <P> During the Tang dynasty, Vietnam was called Annam until 866 . With its capital around modern Bắc Ninh, Annam became a flourishing trading outpost, receiving goods from the southern seas . The Book of the Later Han recorded that in 166 the first envoy from the Roman Empire to China arrived by this route, and merchants were soon to follow . The 3rd - century Tales of Wei (Weilüe) mentioned a "water route" (the Red River) from Annam into what is now southern Yunnan . From there, goods were taken over land to the rest of China via the regions of modern Kunming and Chengdu . </P> <P> In 866, Annam was renamed Tĩnh Hải quân . Early in the 10th century, as China became politically fragmented, successive lords from the Khúc clan, followed by Dương Đình Nghệ, ruled Tĩnh Hải quân autonomously under the Tang title of Jiedushi (Vietnamese: Tiết Độ Sứ), Virtuous Lord, but stopped short of proclaiming themselves kings . </P>

What country's troops returned to vietnam in 1946