As Crown Prince Nguyễn Phúc Cảnh had already died, it was assumed that Cảnh's son would succeed Gia Long as emperor, but, in 1816, Nguyễn Phúc Đảm, the son of Gia Long's second wife, was appointed instead.
Cảnh's son would succeed Gia Long as emperor. This was what it was assumed. Crown Prince Nguyễn Phúc Cảnh had already died. Nguyễn Phúc Đảm was appointed instead. This was in 1816. Nguyễn Phúc Đảm was the son of Gia Long's second wife.