The federation lasted until finally 1954. During the four protectorates, the French formally left the area rulers in power, who had been the Emperors of Vietnam, Kings of Cambodia, and Kings of Luang Prabang, but in truth gathered all powers in their fingers, the nearby rulers performing only as figureheads. http://thestaircasetvshow71356.arwebo.com/13495084/about-how-many-seasons-of-line-of-duty