Galdan Boshugtu Khan
The 5th Dalai Lama died in 1682. His regent, Desi Sangye Gyatso, concealed his death and continued to act in his name. In 1688, Galdan Boshugtu Khan of the Khoshut defeated the Khalkha Mongols and went on to battle Qing forces. This contributed to the loss of Tibet's role as mediator between the Mongols and the Emperor. Several Khalkha tribes formally submitted directly to Kangxi. Galdan retreated to Dzungaria. When Sangye Gyatso complained to Kangxi that he could not control the Mongols of Kokonor in 1693, Kangxi annexed Kokonor, giving it the name it bears today, Qinghai. He also annexed Tachienlu in eastern Kham at this time. When Kangxi finally destroyed Galdan in 1696, a Qing ruse involving the name of the Dalai Lama was involved; Galdan blamed the Dalai Lama for his ruin, still not aware of his death fourteen years earlier.