The recent history of Tibet has been one of sorrow. Despite the relative impenetrability of its mountains, it was invaded and occupied by armies of the Communist Peoples Republic of China in 1950. After an unsuccessful popular revolt in 1959, thousands of Tibetan refugees fled across the Himalayan Mountains to India and Nepal, and a government in exile was established under the Dalai Lama, the traditional leader of Tibet. Since that time, the refugee communities have grown larger every year, as more Tibetans flee severe political and cultural repression in their Native land.