History
The Red River Delta is where the Vietnamese story begins. The Bronze Age Đông Sơn culture cast its great decorated drums here, and legend places the Hùng kings of Văn Lang in the hills of Phú Thọ; the spiral citadel of Cổ Loa, just outside Hanoi, is linked to King An Dương Vương in the 3rd century BC. Under Chinese rule the delta was the heart of the province of Jiaozhi, and it was here that the Trưng sisters rose in AD 40 and that Ngô Quyền won independence at the Bạch Đằng River in 938, by planting iron-tipped stakes in the riverbed.
The first independent dynasties ruled from Hoa Lư in Ninh Bình until Lý Thái Tổ moved the capital to Thăng Long — today's Hanoi — in 1010. The Trần kings, whose family came from Nam Định, beat back the Mongols three times in the 13th century, again on the Bạch Đằng in 1288. Thăng Long remained the royal city until the Nguyễn moved the court to Huế in 1802.
France took the delta in the 1880s and made Hanoi the capital of French Indochina, laying out its boulevards and opera house, and built the railway up to Lào Cai and Yunnan. The Việt Minh war was won in these mountains, at Điện Biên Phủ in 1954, and Hanoi became the capital of North Vietnam. American bombing struck Hanoi and Hai Phong, notably at Christmas 1972, and in 1979 Chinese forces crossed the border and devastated towns such as Lạng Sơn and Cao Bằng. Since Đổi Mới the delta has industrialised rapidly, and the 2025 reform merged many of its provinces into larger units.
