藩镇跋扈、割据称雄唐朝中期,安禄山和史思明发动了“安史之乱”。战后,安、史余部还保持着相当大的势力,唐代宗为了求得暂时苟安,“瓜分河北地付叛将”(《新唐书》卷二一○《藩镇魏博传序》)。这些叛将就这样成了各占一方的节度使,在政治、经济、军事上专断独行, Dominees domineering, separatism dominated the mid-Tang Dynasty, An Lushan and Shi Siming launched “An Shi disturbances.” After the war, security and history still retained considerable forces. The Tang dynasty, in order to seek temporary shelter, “carved up treason in Hebei Province” (“New Tang Dynasty,” Volume 210, “History of the Wei-Po Patriarchs”). As a result, these betrayals have become the righteous cause for each side and are determined to be politically, economically and militarily resolutely alone.