He was known in Vietnamese contexts as Chiêu Thùy Biện (昭錘卞).
In 1782, by order of the Siamese King, Baen and Oknya Kalahom (Suos) (ឧកញ៉ាក្រឡាហោម (សួស)) captured the pro-Vietnamese regent Talaha (Mu) and had him executed.
[1] Knowing Suos was killed, Cham rebels attacked Phnom Penh,[2] forcing Baen, King Ang Eng and Oknya Kalahom (Pok) flee to Battambang then to Siam.
[3] Later, he came into conflict with the Vietnamese ruler Nguyễn Ánh ("Chao Anam Kok" in Thai).
[5] Baen was appointed a chao muang (governor) of these two provinces under Siamese suzerainty.