The siege of Songping was one of the great victories of Nanzhao during its invasion of the Tang dynasty in 863. Nanzhao took advantage of turmoil in the Tang Protectorate General to Pacify the South (Annan) and allied with local tribes to invade the Tang dynasty, which ruled the Red River Delta in modern-day northern Vietnam. The siege took place at Songping (modern-day Hanoi), capital of the Annan Protectorate, in early 863 during the reign of Emperor Yizong. The siege ended in victory for Nanzhao although their forces were later driven back by a Tang counterattack by 866.
HistoryLayer draws the world as it was in any year from 123,000 BCE to
2026. Move the slider and the borders redraw for that year; the map
carries 23,890 events, 12,790 people, 837 wars and 13,183 cities, each
one readable in place. Signing in is optional and lets you keep what
you find.