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But First, the Story of the Rebellion.
Tang Ming Huang, or Xuan Zong, the sixth emperor of the Tang dynasty, who reigned between AD 713-756, became infatuated by Yang Yuhuan, the consort of his son, Prince Shou, and caused her notionally to enter a Daoist nunnery. She soon became the favourite concubine of the emperor who shared with him her love of music and dance and whose hold over him led to his neglect of state affairs. It is rarely explained that the Concubine Yang was comparatively plump, conforming to the social concept of beauty of the era. By about 740 the Emperor, tired of the daily routine of his high office, now addicted to luxury and women, also became indolent. As the eunuchs gained ever greater control over state affairs so the emperor surrendered power into the hands of two men, Li Linfu and Yang Guozhong, the latter being a relative of the concubine.
Only this one woman, the Concubine Yang [Yang Guifei], a famous beauty, was able to fascinate the ageing emperor. He took her into his own harem where she speedily dominated the aged emperor's consort after which he gradually slid into dissipation with his name forever linked with her and their ill-fated romance. Her hold over him led to his loss of interest in imperial duties transforming him from being a staid and good ruler to a playboy. This led to his downfall and her murder. In the late 740s she adopted An Lushan as her son and she, the emperor and An remained in a very friendly relationship until immediately prior to him rebelling. Despite An's gross and huge frame scandalous stories have circulated down the ages of his sexual excesses with the emperor's concubine, Yang, which may or may not have had any truth to them.
General An lost the emperor's favour when Yang Guozhong, a distant relative of Yang Guifei who had worked his way into power, became the most powerful man in Court. He hated An and with the ear of the emperor he was able to turn the emperor's fondness into one of hate and distrust. Eventually, believing the calumny spread by Yang Guozhong, the emperor lost faith in his favourite general, An Lushan found his position untenable and finally, at the end of 755, he rebelled, almost certainly to counter the threat to himself posed by the ever-growing power of Yang Guozhong and his realisation that he had lost the support of the emperor. An Lushan's army drove east and in a series