The Siege of Pyongyang took place in the year 668. Forces of the Tang dynasty of China and the southeastern Korean kingdom of Silla besieged Pyongyang which was the capital of the northern Korean kingdom of Goguryeo. After months of siege, Pyongyang fell to the combined Tang-Silla forces on 22 October 668, putting an end to the 700-year old kingdom of Goguryeo which was directly annexed into the Tang.

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