Hồ Quý Ly
On March 15 of Lunar calendar, 1398, under pressure of Hồ Quý Ly, Thuận Tông, had to cede the throne to his three-year-old son Trần An, now Trần Thiếu Đế, and held the title Retired Emperor at age 20. According to "Đại Việt sử kí toàn thư", actually Hồ Quý Ly wanted to overthrow Thuận Tông but before his death, Nghệ Tông made Quý Ly promise him supporting the Emperor therefore Hồ Quý Ly decided to force Thuận Tông resign before taking over the throne from the new emperor.