Is there an article about history of tibet?

Within the PRC the TAR is identified with Tibet, a characterization hotly disputed by many Tibetan exile groups, particularly the Government of Tibet in Exile, which define the terms "Tibet" or "historic Tibet" to include not just the TAR, but also the traditional province of Amdo, today incorporated in Qinghai province and southwestern of Gansu province, and the traditional province of Kham (eastern half), today in western Sichuan province and northwestern Yunnan province. The TAR includes about half of historic Tibet, including the traditional provinces of Ü-Tsang and Kham (western half). Its borders coincide roughly with the actual zone of control of the government of Tibet before 1959.