At the beginning of the 20th century the province (along with Battambang) was in turn ceded back to Cambodia (now part of French Indochina) in the Franco-Siamese Treaty of 1907, due to the failure of 1904 version of treaty which the French accidentally annexed Thai speaking city of Trat.
In the early 20th century, the province was subsequently ceded back to Cambodia (along with Battambang) as a result of the Franco-Siamese Treaty of 1907. This transfer occurred because the initial 1904 treaty version had been mistakenly annexed by the French, leading to the inclusion of the Thai-speaking city of Trat.