Thiệu Trị
Emperor Minh Mạng, who had sent reinforcements under Phạm Văn Điển, died after a fall from a horse in February 1841. The new emperor, Thiệu Trị, reversed Vietnamese policies on Cambodia and ordered the retreat of all Vietnamese forces. By October 1841, the Vietnamese had retreated to An Giang Province. Viceroy Trương Minh Giảng evacuated Phnom Penh and committed suicide since he took responsibility for the loss of Cambodia.