After that, he worked as an interpreter for the French, served as a green loincloth soldier, and rose to the rank of commander of the Bảo An Binh Battalion.
When Japan surrendered, a number of figures urged the Montagnards to occupy the French administrative and military facilities abandoned by Japan and participated in the temporary administrative committee.
The Dak Lak National Salvation Army Battalion (Vietnamese: Cứu Quốc Quân Đắk Lắk) he led, participated in many major battles in the Central Highlands.
[1] In 1946, French troops took turns retaking the major cities of the Central Highlands.
When he was released from prison, he returned to his village and was used again by the French as a volunteer due to a men shortage.