::That's a better title, but a focus on 1950–1951 is best, and limited coverage of the background and future can be placed in the respective sections. Establishing the date as "1949" indulges TGIE irredentist fantasies about expanding the definition of political "Tibet" into Qinghai and the like. "Tibet", as in the common "incorporation" use (from which Wikipedia should not deviate to be clear), meant the autonomous government and its controlled territories.