Those in attendance commemorated fallen Vietnamese soldiers from throughout history, including those who fought against the Yuan-Mongol invaders from the north during the Tran dynasty in the 13th and 14th centuries.
They also prayed for national peace and prosperity for all people.
Following the sombre ceremony, thousands of colorful flower-shaped lanterns were released along the Luc Dau River. The event concluded with a vibrant firework display.
Earlier in the day, a provincial-level rowing tournament took place at the Kiep Bac Temple Lake. More than 120 male and female rowers took part, representing six teams from around the province.
Situated on over 8 hectares in Chi Linh town, the Con Son – Kiep Bac historical site is closely associated with the lives and careers of two national heroes; Tran Hung Dao (1228-1300), who led Vietnamese troops to repel three major Mongolian invasions in the 13th century, and Nguyen Trai (1380-1442), who was recognised as a Great Man of Culture by UNESCO.
It was recognised as a national heritage site in 1962 and a special national heritage site in 2012.
The Con Son – Kiep Bac spring and autumn festivals have been recognised as national intangible cultural heritage.
