Boat racing is believed to have been celebrated in Cambodia since at least the reign of Jayavarman VII in 1181 AD. This was likely to commemorate the heroic victory of the Khmer navy, which liberated their land from the Cham troops of the Champa Kingdom in a boat battle on the Tonle Sap Lake. Literary record According to the record of Thach Pen alias "Piko (Pang Khat)" from the Khleang Province (Soc Trang), Kampuchea Krom (Southern Vietnam), in 1528 AD, King Ang Chan I ordered Ponhea Tat, the commander of the Khmer navy in the Bassac District of Kampuchea Krom, to prepare the Khmer army to defend the province of Preah Trapeang (Tra Vinh, Vietnam), which was under attack from the Đại Việt kingdom under Mạc Đăng Dung. The naval boats were divided into three groups: Group 1, called the "Toap Srouch", or vanguard, with boats shaped like modern racing boats called Ngor boats. Group 2, called the reserve army, with two rows of rowing boats shaped like modern stand racing boats. Group 3, called the Bassac Troops, was a large, very long open boat with a roof across the front, oars, and sails, shaped like the Bassac boat, called the Pok Chay boat. The boat was only used at night with lanterns, as a food supply boat for the army, delivering rice from Kampong Chhnang to Kampuchea Krom in Preah Trapeang Province until the Cambodian navy won. After his victory, concurrent with the crowning of King Ang Chan I in 1529 AD, he celebrated the Bondet Bratib ceremony every year with candles at night to commemorate the victory over the Đại Việt and to give thanks to the goddess Ganga (Preah Mae Kongkea in Khmer language). French protectorate As early as 1873, depictions of a Cambodian racing boat appeared in the French publication Le Magasin Pittoresque, and in 1887 the French magazine Les Colonies Françaises dedicated several pages to the meaning of the Water Festival. The festival had been celebrated occasionally after Phnom Penh became Cambodia's capital in 1866 during the French Protectorate period. After World War II, the Water Festival was also celebrated in Phnom Penh in 1945, and then in 1953, after the Independence of Cambodia from France. In the 1960s, the scope of the festival grew with double the number of boats participating in the Phnom Penh boat racing festival compared to prior years. The festival