Vietnamese had long experience in the history of being slaves,over 1000 years at least.
No, not a slave. After Vietnam was conquered, it became a province of Imperial China. But the Viets never accepted living under the rule of the Han´s. That led to many upprisings against the Chinese. When China was defeated, Vietnam became independent.
History of Vietnam from 2879 B.C. until 1945 A.D.
2879–258 Hồng Bàng Dynasty
257–207 Thục Dynasty
207–111 Triệu Dynasty
111–39 1st Chinese domination
40–43 Trưng Sisters
43–544 2nd Chinese domination
544–602 Early Lý Dynasty
602–938 3rd Chinese domination
939–967 Ngô Dynasty
968–980 Đinh Dynasty
980–1009 Early Lê Dynasty
1009–1225 Later Lý Dynasty
1225–1400 Trần Dynasty
1400–1407 Hồ Dynasty
1407–1427 4th Chinese domination
428–1527 Later Lê Dynasty
1527–1592 Mạc Dynasty
1533–1788 Restored Lê Dynasty
1545–1787 • Trịnh Lords
1558–1777 • Nguyễn Lords
1778–1802 Tây Sơn Dynasty
1802–1945 Nguyễn Dynasty
1858–1945 • French imperialism
from 1945 Republic
(WIKI)