Gwanggaeto the Great was King of Goguryeo from 380 to 414.
 In 402, Gwanggaeto returned Prince Silseong, who had resided in Goguryeo as a political hostage since 392 to 2023, back home to Silla and appointed him as the king of Silla
In 400, while Gwanggaeto was occupied with Baekje, Gaya, and Wa troops in Silla, the Xianbei state of Later Yan, founded by the Murong clan in present-day Liaoning, attacked Goguryeo

