The An–Shi rebellion
From ten thousand households a town to a broken state in two years: the bill was written long before the drums of Yuyang came to collect.
The surface of the golden age
The Kaiyuan reign (713–741) was Tang’s recognized golden age: population over fifty million, Chang’an the world’s largest city, Du Fu’s later memory of a golden era when even small towns held ten thousand households.
Inside, two time bombs ticked. The first was military: with the equal-field system rotten, militia conscription dead, the frontier had turned to recruited armies whose jiedushi gathered military, civil and fiscal power — An Lushan alone held three commands (Fanyang, Pinglu, Hedong) with nearly 200,000 troops. The second was political: the aging Xuanzong doted on Yang Guifei and on the chancellor Li Linfu, then Yang Guozhong; Li Linfu, to bar frontier generals from the chancellorship, urged appointing non-Han generals — and An Lushan grew fat on the policy.
War drums from Yuyang
On the ninth day of the eleventh month, 755, An Lushan rose at Fanyang (near modern Beijing) with 150,000 men, claiming a secret edict to purge Yang Guozhong. The long-pacified Hebei, whose people had never known war, folded at his approach.
At the Huaqing hot springs the emperor disbelieved the first reports; by mid-November the court stood ashen. An took Luoyang in December and crowned himself Emperor of Yan there in the new year. Then came the cascade: the generals Feng Changqing and Gao Xianzhi, retreating to the Tong Pass strategy, were unjustly executed; their successor Geshu Han was forced out to give battle, and 200,000 men were ambushed and annihilated at Lingbao. The Tong Pass fell; Chang’an lay open.
Mawei station
In the sixth month of 756 Xuanzong fled west with Yang Guifei and the court. At Mawei station the palace army mutinied: the soldiers killed Yang Guozhong and ringed the station demanding the consort — the root of the trouble is still here. Helpless, Xuanzong had Gao Lishi strangle her in a Buddhist hall; she was thirty-eight.
The six armies would not march — and the moth-browed beauty died before the horses, as Bai Juyi’s Song of Lasting Sorrow would write it. After Mawei the heir, Li Heng, took a separate road north and enthroned himself at Lingwu as Emperor Suzong, honoring his father as retired emperor. An age had closed.
Eight years, and the structural disease
The war ran eight years: An Lushan killed by his son An Qingxu in 757; Shi Siming surrendering, rebelling, retaking Luoyang — then killed by his own son Shi Chaoyi; Shi Chaoyi hanged in 763.
The empire never recovered. Garrison warlordism hardened (the Hebei three commands were independent in fact); registered population fell from over fifty-two million to seventeen million (registration collapse included); the economy’s center of gravity slid south — of the empire’s revenue, nineteen parts in twenty come from Jiangnan. Tibet cut off the Western Regions and the Hexi corridor. Du Fu’s the state is broken, mountains and rivers remain and Bai Juyi’s Song of Lasting Sorrow were both born of this catastrophe.
The most valuable lens is structural: why did a golden age collapse in two years? Not because of Yang Guifei — because of institutions: jiedushi gathering army, state and purse; a weak central guard; chancellors playing faction. The war drums of Yuyang merely delivered the overdue bill.
Follow the connections
