Battle of Như Nguyệt River (1077)

Battle of Như Nguyệt River
	Part of Song–Vietnamese war (1075–1077)
Date	18 January 1077 – 28 February 1077 ; (4 weeks)
Location	Cầu River, Bắc Ninh Province, northern Vietnam21°07′26″N 106°17′52″E / 21.12389°N 106.29778°E
Result	Decisive victory for Đại Việt; Song offensive halted and withdrew due to logistical problems
Belligerents
Song dynasty	Lý dynasty ;
Commanders and leaders
Guo Kui ; Zhao Jie	Lý Thường Kiệt ; Hoằng Chân † ; Chiêu Văn † ; Thân Cảnh Phúc † ; Lý Kế Nguyên ; Lưu Ba
Strength
50,000–100,000 soldiers, 200,000 draftees	Unknown, 400 boats
	Location in modern-day Vietnam

The Battle of Như Nguyệt River, also called the Battle of the Cầu River, took place during the final phase of the Song–Vietnamese Border War (1075–1077). The battle occurred along parts of the Cầu River that flows through modern-day Bắc Ninh Province of Hanoi in February 1077. At the battle, the Vietnamese led by admiral-general Lý Thường Kiệt successfully fended off the Chinese's attempt to cross the river, eventually forced the Song to retreat and the war ended with a peace negotiation.