Lý Thường Kiệt
In the 1050s, tensions between Đại Việt and the Song dynasty became high. In 1075, Wang Anshi, the chancellor of the Song dynasty, told Emperor Shenzong that Đại Việt was destroyed by Champa, with less than ten thousand soldiers surviving, so it would be a good occasion to annex the country. The Song emperor then mobilized his troops, this prompted the Emperor Lý Nhân Tông to authorize a preemptive invasion into Song territory. Lý Thường Kiệt lead an army to capture Qinzhou, Lianzhou and laid siege to Yongzhou (present day Nanning). Yongzhou fell in 1076, its populace of 58,000 were massacred. The Song sent a great army to invade Đại Việt but Lý Thường Kiệt managed to stop them at the Battle of Như Nguyệt (1077). The Song and Dai Viet would then made a peace treaty.